Hypnotoad

The Hypnotoad is a large toad with oscillating multicolored eyes. While hypnotizing someone, it makes a loud buzzing noise, known as the "Angry Machine". Originally this was just a temporary sound, but it went through and the audience and staff both liked it. It can hypnotize anything at will, including an entire crowd of humans. It once used its ability at a pet show to hypnotize sheep and cheated by hypnotizing the judges. The Hypnotoad has its own show called Everybody Loves Hypnotoad, which, according to Fry, has been going downhill since season three.

Trivia

 * A full 22-minute episode of Everybody Loves Hypnotoad was featured on the DVD release of the film.
 * It's eyes are naturally green colored. However they do not automatically revert to green the moment it stops hypnotizing.