Here is the full list of all 32 SpongeBob SquarePants: Battle for Bikini Bottom - there are Rehydrated achievements.
Find all the Lost Campers in Kelp Forest
Defeat the Flying Dutchman
Finish the main missions of Goo Lagoon
Defeat Robo-Plankton and neutralize SpongeBot SteelPants' Brain.
Defeat SpongeBot SteelPants in the Chum Bucket Lab
Complete Mrs Puff's Mission in Downtown Bikini Bottom
Reclaim the Flying Dutchman's ship in the Flying Dutchman's Graveyard
Defeat Prawn in the Mermalair
Finish the main missions of Rock Bottom
Destroy at least one type of every robot in the game. Bosses don't count
Get All Golden Spatulas in the SpongeBob's Dream level
Find all the hidden Golden Spatulas in Bikini Bottom.
Find all (80) of Patrick's Socks
Get 100% completion. All golden spatulas and all socks
Get all 100 Golden Spatulas
Get 75 Golden Spatulas
Defeat Robo-Patrick in the Industrial Park
Clear all the Ski slopes in Sand Mountain
Complete the Rolling Ball Puzzle in Mermalair
Defeat 100 robots as Patrick in the campaign.
Find half (40) of Patrick's Socks
Get 50 Golden Spatulas
Complete Squidward's Mission in Jellyfish Fields
Defeat Robo-Sandy in the Poseidome
Collect everything in SpongeBob's House.
Defeat 100 robots as Sandy in the campaign.
Defeat Jellyfish King.
Get 25 Golden Spatulas
Find 15 of Patrick's Socks
Collect 10 Golden Spatulas
Defeat 100 robots as SpongeBob in the campaign.
Talk to Squidward 10 times as SpongeBob.