Sewer rat

Ricky (German Riesenmaus "Giant Mouse") was the boss of the Macro Zone in the game Super Mario Land 2: Six Golden Coins. His fight is similar to the battle with Morton Koopa Jr. during the events of Super Mario World. Ricky will run up walls and into pipes, and will eventually crawl to the top of the ceiling and fall straight onto Mario. If the plumber jumps on top of the giant mouse three times, the creature will be defeated. Ricky will fall off the screen, and Mario will get one of his six Golden Coins.