you keep playing through the dungeons until a guild event comes up.
beat darkrai and recruit manaphy three days later he will tell you about marine resort
nothing really although you can now recruit the Pokemon that needed the marine resort to be recruit although you need the secret slap or the mystrey part
after that you gotta find manaphy and it gives you the location of marine resort
you play through all the dungeons until a guild event comes up
You can evolve your starters.
the marine resort is west of sunyshore
beat darkrai, get marine resort (manaphy joins you, after a few days after you beat darkrai, and will then give you the marine resort a few days later). And get both dialga and palkia (lapras is on the beach, and escorts you to hidden land
beat darkria and manaphy will jion your team and after 3 days manaphy will tell you whare mirene resort is.
To go to the Marine Resort, you have to beat the entire game (all 20 Chapters), and defeat Darkrai. After that, complete three missions (Sentry Duty might not work), and Manaphy will return. Let him join your team, and then do two missions. When you begin walking towards Treasure Town, Manaphy will tell you about the Marine Resort.
You need to beat Darkrai, wait three days, then let Manaphy join you. Then she will show you a place called Marine Resort.
He will evolve at lvl 16 or 18 and 36.....But you have to beat the game beat darkri and get marine resort so you will be lvl 60-90 by then
Marine Resort has 19 floors.