Snowball is a cute genetically altered hamster and The Brain's ex-best friend. He too has aspirations of world domination, and Pinky and Brain are sometimes forced to foil his schemes. Snowball serves as the primary antagonist of the series. He is played by Roddy McDowall (deceased; 1995-1998).
He is despliced and returned to a normal hamster in "Brainwashed Part 3."
Snowball's tail is a stubby little thing, the same faded orange as his fur. He has jowls, pink eyes, and a large head similar to Brain's. His stomach, unlike the rest of his fur, is white.
He is highly intelligent due to the gene splicing and develops complex plans for taking over the world, though he will at times take Brain's ideas and implement them before he and Pinky are able to.
- Season 01, Episode 09 "Snowball"
- Season 01, Episode 20 "Welcome to the Jungle"
- Season 03, Episode 27 "Brain Noir"
- Season 03, Episode 42 "A Pinky and the Brain Halloween"
- Season 04, Episode 02 "Brainwashed Part 2: I Am Not a Hat"
- Season 04, Episode 03 "Brainwashed Part 3: Wash Harder"