Tom: What did you do to my drink?!
SpongeBob: I… [giggles] I… [giggles]
Tom: You what?!?!
SpongeBob: You asked for a couple of ice cubes in your drink, and I only put in one! [laughs]
Tom: I guess that is pretty funny. [laughs as he walks off]
SpongeBob: [laughs so hard his tongue pops off] Hey, your shoes untied. [tongue looks down] April Fools! You’re not wearing shoes! [laughs and hugs his tongue, which smiles.]
How to unlock all characters- http://www.gamespot.com/the-grim-adventures-of-billy-and-mandy/cheats/platform/wii/