Bubble Buddy (Leader Plankton!)

Bubble Buddy is a bubble that was blown up by SpongeBob. When he heard SpongeBob was now Leader Plankton's prisoner, he quickly rushed down to the ocean in order to save SpongeBob.

Season 2

 * The Fight Against Bubble Buddy (debut; killed off)

Season 3

 * New Member (mentioned)
 * Reviving Bubble Buddy (mentioned)
 * Komputer Killer Karen (revived)
 * Get New Members But Lose The Old (killed off; revived)