Nokottasu

Nokottasu (also generically referred to by Prima as "Turtles" ) are pudgy, giant Koopa Troopas found only in Mario & Luigi: Superstar Saga. They are cross-eyed and have oblong shells which extend up from their backs, behind their heads. They block certain paths in the Beanbean Kingdom and recite the line, "Derr... No matter what you hit me with, you can't knock me down. ...I think." They cannot be stomped, and the player's hammers, Firebrand, and Thunderhand will not affect them; however, Mario's Dash technique can knock them down, forcing them to move aside. One also appears in a house in Beanbean Castle Town.

In Mario & Luigi: Superstar Saga + Bowser's Minions, they have been replaced with ordinary Big Koopa Troopas.