Bank robber

The Bank Robber is a actually named Franky Perfish, in a precognition by SpongeBob, stole SpongeBob's identity and stole from a bank. His only appearance is in the episode, "Missing Identity", he wore a ski mask and the tag on his chest is SpongeBob's Krusty Krab name tag. His Identity was revealed in episode 42- Terrible Bites.

Looks

He has a blue benie

He is green