Nicktoons: The Undersea Rescue is the sequel to Nicktoons Unite! and Nicktoons: Battle for Volcano Island and is the prequel to "Nicktoons: Globs of Doom". Characters from SpongeBob SquarePants, Danny Phantom, The Fairly OddParents, The Adventures of Jimmy Neutron: Boy Genius, and Tak and the Power of Juju appear.
On this chapter, sea-faring adventure, SpongeBob and his Nicktoons friend need your help to save Mermaid Kingdom from a mean garbage-dumping Octopus by bringing a magical mermaid crown back to Marina the Mermaid! But how will our fearless heroes get to Mermaid Kingdom? They'll have to travel over land and sea...and become a mermaids and mermen!
These are the characters confirmed so far.
- SpongeBob SqaurePants
- Patrick Star
- Danny Phantom
- Sam Manson
- Timmy Turner with Cosmo, Wanda and Baby Poof
- Jimmy Neutron