Tantrum

Tantrum (real name Tristram) is a young mouse from the Metropolis Zone. He is incredibly immature, and frequently throws tantrums when he doesn't get his way (hence the name). He also has a habit of causing problems, then relying on other people (notably Tails) to get him out of them.

History
Under unknown circumstances, Tantrum was captured by Doctor Robotnik's forces and made into the organic battery of a Buzzer. He was eventually freed from the Buzzer by Tails in the Spring Flower Zone, at which point he immediately threw a tantrum because he was lost, only stopping when Tails agreed to take him home. However, before they could fly away, they were accosted by the bounty hunter known as Fleabyte, who wanted to turn them into Robotnik for the reward. While attempting to escape, Tantrum fell into a deep pot-hole, and Tails was forced to follow him.