Here is the full list of all 46 Disney Epic Mickey 2: The Power of Two achievements worth 1,000 gamerscore.
Finished all quests
Awakened every Spirit
Collected 176 Collectible Pins
Collected every Costume
Collected every 2D Film Reel
Got all Adelle's photos from the official Picture Spots
Matched Seth's flowers to OsTown's statue
Completed a race in Autotopia
Rescued all the gremlins
Got all three of Metairie's pictures
Photographed every enemy
Ignored Daisy AND Smee's suggestions
Built both statues in OsTown
Found 88 Collectible Pins
Befriended 100 enemies
Revealed every knothole surprise
Befriended the Blotworx and helped Petetronic
Awakened a Spirit
Played through every D.E.C.
Shuttered all four train stations
Befriended 50 enemies
Defeated the Mad Doctor's new ride
Dealt with all the Guardian Siphons
Got through Ventureland's construction area
Finished Dark Beauty Castle with two players
Mickey revived Oswald while playing co-op
Defeated Prescott's mechanical creation
Chased Prescott through the Floatyard
Scouted a path through Fort Wasteland
Dealt with all 3 dioramas
Destroyed 100 enemies
Got through Blot Alley by any means
Opened the way to Blot Alley
Entered Angel Falls, exited Devil Falls
Reprogrammed a Beetleworx
Changed costumes for the first time
Defeated the Blotworx Dragon
Destroyed 50 enemies
Braved Disney Gulch
Found a way through the Rainbow Caverns
Restarted the Rainbow Falls Substation
Solved OsTown's Thinner problem
Navigated both halves of Mean Street
Acquired a Collectible Pin for the first time
Finished Yen Sid's Lab
Painted every star and comet in Yen Sid's Lab