What to do next

Darkrai was the final boss. If you took him down, then you have almost cleared story mode. All thats left is to wait for Manaphy and Cresselia to return, have them join your team, and then go on an exploration of Marine Resort with Manaphy. Then you can evolve and truely have beaten the game for the second time. Next, try getting all 491 that appear in this game (and if you really want a challenge, get 'em all to level 100!)!

Gamer, Darkrai was the final boss. Once you defeat Darkrai, you have completed the full game. You can now go to Sharpedo Rock, and you will see Cressilia. She will want to join your team. Sooner or later, Manaphy will return and will want to join your team as well. All you can do now is recruit all the rest of the 491 Pokemon in the game. If you want an even greater challenge, try getting all of them to level 100.

Hope this helps,
Sk8rboy

Darkrai was the last boss now talk to cressalia she will want to join your team wait a couple of days do some missons and manaphy will come back and ask to join your team wait a couple of days do a misson or two then manaphy will come tell you about the marien resort. Then you can recrut the rest of the lendrearys. Now try to get all the Pokemon and the ledrenderys and get to level 100

Well yes darkrai is the boss but if you want something else if you have wifi start your game and select wonder mail press recieve using wifi connection then you get the secret 7 missions you can get groudon, kyorgre, rayquaza, heateran, arcues, Mew, and giritina I already got giritina and goin for arcues and you have to battle them 3 times to recruit them 30 floors in each lvl so no big deal but the Pokemon there 50 and up each watch out for nidoqueen earth power too strong................hope it helps all who sees this message

Darkrai is the last official boss, but there are the other Wondermail legendaries if you haven't faced them yet.