| Character Information
In "The Factory," black rats appear, which are much more realistic-looking in both body and face. Their tails are the same shade of black as their bodies.
- "The Hero": One is in Gumball and Darwin's food.
- "The Castle": A lot are the Hobo's friends, and they attack Anais.
- "The Sweaters": Two have a rat fight in the cafeteria, much to Sarah's dismay.
- "The World": A few circle around an evil squirrel.
- "The Gripes": Several of them are used by Darwin to trash the Wattersons' house.
- "The Pizza": A few are held by the tail by Richard and given to Larry.
- "The Outside": Two are seen roasting a cockroach.
- "The Console": Three are beaten up by Gumball, Darwin, and Anais.
- "The Singing": One sings in Miss Simian's cup, and scares Teri. He and another one later sing in the sewer.
- "The Puppets": One jumps out of Frank's mouth.
- "The Anybody": Some are grabbed by Clayton and Darwin in the sewer.
- "The Factory": Multiple black rats appear during the song.
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