Here are some examples of characters that *might* be considered similar to a clown, but they aren't truly evil:
* The Chaotix: This detective agency is comprised of a group of colorful and eccentric characters, including Vector the Crocodile, Espio the Chameleon, and Charmy Bee. While they can be silly and unpredictable, they are ultimately heroic and fight alongside Sonic.
* Big the Cat: This fishing-obsessed feline is known for his goofy demeanor and often acts like a clown. However, Big is a kind-hearted character and is not evil.
It's important to note that the perception of clowns varies widely, and what one person considers "evil" another may find simply whimsical. However, there is no official character in the Sonic series that is designed to be a villainous clown figure.