Ankoopa

From Mariopedia

Ankoopas are gigantic Koopa Troopas found in Mario & Luigi: Superstar Saga. They block paths and recite the line: "Derr...nothing can knock me down!...I think." Unfortunately for them, Mario's Firebrand techniques can knock Ankoopas down. In order to master the firebrand, you must visit the Jellyfish Sisters in Gwarhar Lagoon. There is an Ankoopa found in a house in the town too.