after finding the rellic, you need to go to the world link, then choose equipment.
once there, you have upgrade equipment, ready equipment and compare equipment.
choose the ready equipment button and double tap it.
after that's done, you must double tap on the current party heading, then here comes the tricky part.
you have to turn VoiceOver off, you must tap the half of the screen either on the left edge or the right edge.
you need to tap it until you hear a sound like when you confirm the party selection.
after that, you'll come across lots of text then your journey begins.
after that text you'll hear a music and then the menu comes up.
flick right until you hear play and double tap it.
that's all for my explanation, I hope it will help you guys.
I know it sounds a bit tricky but it is still worth trying.
I've played the game some more and now I'm partisipating in the event dungeon, which is going through an icey path to rescue princess alexandria, or something like that(correct me if I'm wrong) and also I have 6 party members, some of them are joined in the previous story, the final fantasy IV dungeon.
going in to the wilds, collecting pokedex, and capturing them are my kind of thing,
training them, making them evolve, and generally making them stronger is my ultimate goal,
fighting other manamon tamers, winning the tournament, and fighting octoros are what these manamons like to do,
and ultimately, I become the master of mana!