Rocky
From Sonic Retro
Rocky (ロッキー), also called Joe Sushi, is one of the animal friends imprisoned by Dr. Eggman for use as 'organic batteries' for his badnik army. Rocky's species is a walrus and he was the inspiration for the character Rotor Walrus featured in Sonic the Hedgehog (TV series) and Sonic the Hedgehog (Archie comics).