Ankoopa

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.

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

Description
Nokottasu block certain paths in the Beanbean Kingdom, reciting the line, "Derr... No matter what you hit me with, you can't knock me down. ...I think." when spoken to. One also appears in a house in Beanbean Castle Town.

The road-blocking Nokottasu can only be moved with Mario's Dash technique, which knocks them down briefly; they will move aside and express surprise at the Bros.' ability, allowing the pair to progress.