LOL @ #9
SpongeBob SquarePants: Keep Bikini Bottom Beautiful/A Pal For Gary - 3.3/10 (632+ Votes)
Broken into two parts, SpongeBob SquarePants's poorly rated season 7 episode "Keep Bikini Bottom Beautiful/A Pal for Gary" gets most of its criticism for its second part, "A Pal for Gary," in which SpongeBob gets his pet snail, Gary, a friend to keep him company.
Unfortunately, the new friend, Puffy Fluffy, is highly aggressive towards Gary and even tries to kill him all while SpongeBob remains completely oblivious. Highly criticized by fans for its cruel treatment of Gary by Puffy Fluffy and SpongeBob, the episode currently sits at a 3.3 rating on IMDb.