Okay, here are a few really strong manamon which, if you play them right, will pretty much wreck the game in a good way. Want an easy time? Read on.

Fiendour: Good HP, great defenses, solid attack, decent undead moves, plus Stifle, Horrify and Desoul. Need I say more?
Dussoket/Erroir: These two are actually pretty comparable. Dussoket has slightly better defenses and he's faster, but Erroir gets Power Fang and Slash and actually does hit just a little harder, plus gets a very early Sparking Tail and Lightning Bolt. Dussoket will eventually get Shadow Claw, Oblivion Slash, Sonic Missile, Charge of Fury, AquaZap (only as a Zapistan, mind you), so its coverage options are just better across the board, but Power Fang is hard to say no to.
OR
Mondevol: Magic is a very strong type in this game, as is electric. Mondevol will get Superspark and Aura Master for coverage, plus it's pretty tanky. I think I worked it out in an earlier post that an electric type can handle something like 40% of the Master Stadium all by itself, and Mondevol can handle even more. Just for reference, it takes Garganchan, Martiagle, Fowliture, Ghoperto (Ghoperto has no dangerous ghost moves), Orystar, Skirial, Turoison, Dramagon, Arctana, Squarpha, Submenno, Tarboo, Recobrah, Sacroloon, Dragomier and Jimitron. That's sixteen manamon out of a total of twenty-six. And it won't necessarily one-shot them all, but it does super-effective damage against them all. Oh yeah, and it will resist fire, so in a pinch it can be used as a wall against the first tamer because it resists a bunch of stuff. Stick a Broomstick on it, and Garganchan can't wail on it with Earthquake. Mondevol isn't the sort of manamon you put on your team if you just want to win vs. everything in one hit, but combine it with Fiendour and you've got a particularly strong core (ghost moves are sadly just not common enough to threaten it).
Sacroloon: I disparaged this guy early on, and I was wrong. Sacroloon's special defense is very good, its defense is meh, its speed is high, and it gets both screen moves so it can shield your team. It also has a lot of HP, which means I think it generally has a higher base stat total than most other manamon. This guy won't win you battles in a move or two either, but at least when he hits stuff, he'll get the first attack, and if it's weak to holy, he's got a good shot at a kill.
Blaizond: Dear god is this thing strong. The only reason he's not stronger is because flame types, while they get a lot of nice moves, don't have a ton of relevancy in this game except when the game suddenly starts chucking Guerrerrol and Thornita at you all over the place. Has good speed and excellent special defense, but a fairly lackluster defense, so watch it.
Leonatar: This one is a tiny bit frail, but it's fast, hits hard, and has all the tools it needs. It's a standard-earth type that gets Slash, Earthquake and Charge of Fury, and also gets Roar and Battlecry (to enhance attack and to sharply lower foe's defense, respectively). It's not so much that Leonatar is broken though; it's just that everything else is bad. In an ideal world, many more manamon would be as good as (or have as much coverage/support as) Leonatar, and it wouldn't be so amazing. As it stands though? Very good manamon.
Eksponge: This one has great defenses on both sides, gets Drench and oddly also gets Limb Thrust, plus Restrain. It's immune to water attacks, and its water moves get stronger when it goes below 1/4HP. HP isn't the best, but it's not bad. Turoison is supposed to be a tank, but this thing beats Turoison handily on that score.
Elvond: Very fast, good magic attack, solid defenses (not great though) and high HP, plus Inner Healing, plus Smoke and Mirrors, plus one of the only users of Magic Wave. This thing cries out for Meteor Rush, but it's still a great magic type.
Martiagle: High attack, high speed, Hone Blades for an attack boost and even Batter Branch for weird coverage. Best flying type in the game if you want pure damage. Watch for low special defense.
Deciced: Ice type with modest speed and excellent attack, plus it gets Frigid Touch and Night Stick for dual STAB. Bad special defense and doubly weak to holy, so watch out.
Mortrex: Aside from a weakness to holy attacks, this guy is hard to kill, and has very solid stats across the board.
Titomaton: Aside from a huge problem with earth (use a broomstick), this steel-electric type is a great tank, probably a better pure tank than Mondevol but hampered a bit more because it's part steel instead of part magic (magic is much better than steel).
Remullion: Very good stats across the board, probably the best fighting type in the game even if it's part steel.
Dramagon/Dragomier: These two squeak onto the list. Dramagon is a little slow and kinda average-ish and Dragomier has bad defense, but otherwise these two are pretty good. Draomier hits very hard and eventually, way down the road, gets some nice moves. Dramagon gets moves much earlier than that, plus it has a solid air attack as well.

If I just wanted an easy game, I'd pick a team of six from that list and just go crazy. There are others who aren't terrible, but those are your best, I think.

And fighting...yeah. Power Punch isn't bad, but then you get Power Kick (somewhat inaccurate) and Blind Rush (terrible). Ninjarkin is supposed to get Shadow Claw, yes, but apart from Blind Rush the only same-type attack moves it gets which it can rely on are Shadow Claw (50 power) and Rookie Kick? Seriously, Rookie Kick, on a freaking ninja master? That's an insult to all ninja masters!

hi! i've finished manamon playthrough and i was really happy with my team which looked like:
Tarboo, this guy rocks. it stood as a meat against the high level stadiums, it can fight back, only problem is that it's slow as hell.
fiendour, this guy, along with next team member of mine recked shadow kingdom in less then an hour, i'm not joking. it's tankesh, it can fight back, there's litterly no downside to him as long as you have the headstone amulet on him. i destroyed 5 out of 6 manamon on Seinaruses first team, same as with the other one, the 94's/95's one. they were practicly helpless.
mondevol. love this guy, equip a broomstick on the it and it will be almost impossible to take him down.
leonatar, it rocks in it's last form, and swept mathews mortrex in 2 earthquakes.
placebot, i  ground a peace for him that allowed me to use solar cannan and other moves, since them, he had saved my life more then once. covering as flame, water, magic, and fighting types when needed. it's werth to grind those credits!
polosses, of course, this guy was used to destroy the god beast, ugh, i really wish you could avoid that fight.
i dropped leafox for the ice legendary, just because i favor it, and because i already had plant coverage, thanks to placebot.
anyway, i think i'm done with manamon for a while.

Hi, is it possible to get the ost from this game?

There are a lot of them. And once I finish the manapedia and fight the doctor, I'm well and truly finished.
This means the guide, too, unless someone tells me definitively of stuff I've missed.
I predict that this thread won't reach to page 150 unless someone artificially bloats it.

So, just a moment of your time, if you please. A very, very telling observation:
If I had a Gameboy or Gameboy Colour, I would more than happily bust out Pokemon Crystal, or Gold/Silver again. Yeah, it's 8-bit sound. Yeah, I can't see the stats. Yeah, I can't read the dialogue and I have to figure out movelists online or via trial and error. Yeah, Unown and Delibird and Noctowl and Ledian suck. But I'd still happily do it.
Teachable moves, fairly good balance, decent representation in all types, and a nice tight story that stayed cohesive even if it's a bit juvenile. Those things make me willing to play a game that was released almost twenty years ago. I flat-out guarantee you that the same will not be true of manamon. Pokemon games have more appeal than they deserve, in my opinion, but even on dated systems and with terribly outdated graphics and sound and other limitations, the games still survive. There have been thousands upon thousands of pages devoted to the metagame of pokemon, and manamon, by comparison, will be a memory this time next year, with someone very occasionally asking a question that's already been answered, or someone asking if the game is going to get any more updates.
And that, I think, above all else, is what makes me sad about this one.

It's not a bug. You're just getting unlucky. If you don't like the stats of your starter, breed it. Seriously.
Banyardan's attack is probably its highest natural stat, with speed second. Its special attack isn't bad though. Its defenses and HP are a shade on the low side. I really do feel like this thing got quietly nerfed. Either that, or I'm just not that observant, and thought he was better than he was for awhile.

Myaneko is busted. Tons of HP, good speed, awful everything else. It tries to get moves like Bizarre Illusion and Subliminal Radio Wave as well, and it does get Divine Protection to shore up its god-awful defense (no Divine Barrier though), but it just can't play annoyer with this sort of stat spread. It's doubly weak to undead, doubly weak to insect I believe, and I think it might also be doubly weak to ghost. Not only that, but it doesn't really resist a lot, and even when it does, it still dies. I've Blaze Rampaged a Myaneko with Tylovile for a 2-hit kill, and this thing is supposed to resist flame attacks. Put it that way.

Octoross's team is kind of crap actually. I want to say Orystar kills over half of it (Ratiera, Sansurgion, Skirial, Trumer with ease, without even thinking twice about it), and I always have a magic type on hand for precisely this reason.

A few things:

1. Skirial will get Rage Bug, but its stats never get all that good. It's also weak to damn near everything under the sun.
2. My guide says where to find Viralite. Hint: look in places where people once lived, and are now shocked by ruin.
3. Personally I think Kuro's team is probably the best of the admins, but Kumori's isn't terrible. Octoross's teams suck though.
4. Get used to Bite. It's Ratsal's strongest attack. Not even kidding. I suppose Power Punch is stronger, but Ratsal won't get a same-type attack bonus for it. Ratiera actually has half-decent attack, but its defenses are modest at best and it lives with a terrible moveset. Two hits from most things and it's dead. If you're gonna use a poison type, at least go with Thundron/Turoison, who have some redeeming qualities to recommend them (they're still bad, but they're better than Ratiera).

@arqmeister: I feel pretty much exactly like you, I think you said it all.
On another note, Octoross's team is indeed really bad, Terrufalo took out most of it in my second playthrough, and if I gave it the gravity magnet it would have taken out even more of it.
@Pika-san: Right now the best thing you can do is to search for some tracks on youtube, by looking at the credits. I managed to find the music of Mineruf Tunnel and Mount Sindar this way. What would have been appreciated is if the credits were so that we could know what was composed for the game and what was not. I am especially curious about my 3 favorite tracks, Orianda City, SnowStar City and Manalith Factory, though the fact there are two versions of that track seems to mean it was composed for the game.
@Jayde: I still have my brother's GBC allong with a bunch of Pokemon games, but the save batteries are dead, at least in the 2G games, for some reason they still work in the 1G ones. So I would happily do as you said, but even then that's not so easy, for Pokemon Crystal for example.

hi,
I really liked most of the battle music as well. I wish there was a way to get the erodium and admin battle music somehow.  I asume there is, if it was not composed for this game.

I have no problem with any of the music in this game. I like to keep it turned down so I can focus more on the game, but I actually like some of the ones that one of the people didn't like. Hansha Village: I think it's supposed to be happy sounding because the first time you get their you have your Manamon back from Octoross. Bell Tower: well it has bells in it, kind of fits the place. Secret Hideout, well I kind of don't understand this one. It's strange. Also I noticed something about the Mt. Cindar BGM. It's kinda lower pitched and almost sad sounding compared to the version on Youtube. And no I'm not uploading this but if you really, want the admin boss, Master Stadium final battle or any otheo battle music, I have them recorded with no other sounds in them. Same with the others. And the factory: I think it's pretty good to fit the area like the Belltower. Notice the beeps. And the cool thing about it is that you can here people singing in it. I don't know what they're saying, but their are voices. Same with the Mythical Battle. It sounds like they're saying "way strong, way strong". And now, it's time for the Viralight line. I got from the Amica Ruins, guessing you can find them in other ruins as well. Also, the Drabao line actually isn't that rare in the first part of the Orianda Field Ruins. Viralight can't even survive, unless I do the level 60 something standard type trick. Take it to a place with a level 60 or 70 standard type, minus Domestress because of the "no destroying Domestress rule" and defeat something with a Viralight. I got to level 27.

So, I think I've stumbled across a foolproof way to find Myaneko. Note that I said "find", not "catch".

1. go to Brightwater Trail.
2. Encounter at least 40 Boibul, 40 Eagawk, 40 Squirmunk and 40 Trumer
3. Close the game, and go eat something. Seriously. The game knows if you do, and you'll never see Myaneko if you don't meet all these requirements.
4. Load Manamon up again
5. Repeat step 2
6. Myaneko will appear. It is imperative that you inflict it with a status condition immediately (sleep is good, paralysis is good, confusion is also good)
7. Lower Myaneko's health to 5% or lower. This is tricky because of Myaneko's huge HP and awful defenses, but you've got to do it. Try and keep the status constantly in play.
8. Start throwing giganets. Meganets or mananets won't do. Alternatively, if you miraculously have yourself a gammanet still, feel free to use it here. Seriously. expect that Myaneko will escape from at least 3-5 giganets with fewer than three bounces each, even if inflicted with a major status problem like sleep or paralysis, even at 5%HP or lower.
Step 9: Myaneko will teleport away.
Step 10: repeat from step 2

If you're still here I hope you recognize this for the half-assed satire/sarcasm that it is. However, I'm not kidding about those numbers. That's exactly what happened to me trying to find Myaneko. So here are the issues I have with this. Aaron, if you're still listening, this is something I forgot in my email a couple of weeks back, and it's something that really, really needs addressing.

1. This thing appears to have the lowest catch rate of any non-mythical. I could be wrong on this, but it seems to escape even at low HP and with status conditions.
2. This thing is probably more busted than Viralite, all told. It gets exactly one ability, which raises its attack (weak stat) when it kills things (which it has trouble doing, given its awful defenses and not-too-good attacking stats. It's only got speed and HP going for it, which doesn't matter much.
3. It's rare. Like rarer than Drabao. I haven't seen anything else even close to this rare.
4. it teleports? On top of freaking everything else, it freaking teleports? Are you serious?
5. This combination is really, really disappointing. Usually when something is a real pain to catch, there's a good reason for it. I don't howl too loudly when Ziognioss or Tabalus can kill themselves with confusion, because they're mythicals. I don't like theIrroadium thing, but that's what the gammanet's for. But something rare, hard to catch and utterly busted? Well, I have to catch this thing if I want to finish the manapedia, but I can safely tell you that it stopped being any kind of fun about an hour ago. It is bad enough that if I knew of some way to cheat a Myaneko into my file, I'd do it. Yes, it's that bad. As I said, if it was a really great manamon, then maybe, maybe I'd deal with it. But it's not. It's probably the worst in the game, yet it's the rarest and arguably the hardest to catch. That's not fun. That's tedium. When a player puts in a lot of effort or time, they expect some sort of worthwhile reward for it. I mean, this fight vs. the doctor is not that big a deal. Maybe I'll be able to get Peggisen without having 157 of 157 manamon, and I can just ignore myaneko altogether. Yes, it's that bad. It's that disheartening.

My suggestions, in order or most to least ideal:
1. Make Myaneko a lot better.
2. Make it a whole lot less rare, but let it remain bad and let it keep Teleport
3. Leave it rare, but just remove Teleport from its move list, that way once you find it, it won't get away

I dunno. Maybe there is some super-ultra-top-secret square to stand on, or path to run back and forth in, to get Myaneko more commonly. But I was freaking everywhere on that trail, and my 161st encounter was a Myaneko which I confused andaparalyzed, whittled down to 4%HP, wasted three giganets on, then lost because it broke out of confusion, avoided full paralysis and teleported.
Enough is enough already.

hi boy,
Could you send those music files to me if possible?  I'd pm you, but the feature is disabled.