Croaker is a character from Kermit's Swamp Years. He is a small blue frog, and is a hand and rod puppet.
Croaker is the highest hopper in the swamp. He is also pretty tough, while Young Kermit, Goggles and Katie Current are more sensitive and Blotch is a bully. However, he soon is run over by a truck and "loses his hop." He, however, gets it back and returns, with his buddies, to the swamp.