Froggy

Froggy is a frog native to the planet Mobius and a friend of Big the Cat. When Froggy unknowingly drank from a puddle of water that was Chaos, he grew a tail. Following this he continued to act strangely. At that moment, a strange robot known as E-102 Gamma abducted Froggy, fleeing from Big and causing the latter to chase after them. Gamma took Froggy to the Egg Carrier where Gamma's creator Dr. Eggman borrowed a portion of Froggy's biological traits to help Chaos regain its physical structure. Big found Froggy on the Egg Carrier only for Chaos to show up to reclaim its tail. After being temporarily absorbed by Chaos, Froggy was rescued by Big. After this, the two returned to their home in the Mysterious Cat Country, using the Tornado to get there. Then Chaos attacked them seeking the Super Emerald in the plame. Big and Froggy teammed up with Sonic the Hedgehog, Tails, and Knuckles the Echidna to stop Chaos. Unfortunately, Froggy could only watch the fights against both Perfect Chaos and Silver Sonic II. After this, the two returned to their home again.