#5: Miss Puff
Oh dear lord...after her Demolition Doofus performance, she's turned into a monster. She tried to freaking murder Spongebob!
#4: The Bikini Bottomites
These people are from the town of evil. They ruined Spongebob's dream (The Sponge Who Could Fly), Patrick's dream (Sing a Song of Patrick), they treated Squidward like a monster (Giant Squidward), did horrible things to Squidward after Patrick read Spongebob's diary (Little Yellow Book), and many more crimes.
#3: Spongebob Squarepants
Spongebob is officially the little yellow devil. He crippled Miss Puff (Demolition Doofus), got a Nudibranch which almost murdered Gary (A Pal for Gary), got Patrick to pet-sit Gary (Pet Sitter Pat), and helped Mr. Krabs enslave wild animals (The Jellyfish Hunter).
#2: Mr. Krabs
Mr. Krabs is the ultimate scrooge who never turns good! He enslaved wild animals (The Jellyfish Hunter), pays his employees with fake money (One Coarse Meal), tries to drive Plankton to suicide (One Coarse Meal), sold rare animals for $5 (Pets or Pests), and many others.