Clumph
The Clumph are rat-like, primitive species that live in the outskirts of the Beanbean Kingdom atop Joke's End. These creatures are highly territorial, and attack any intruders with their clubs. They have three different attacks: the first technique consists in smashing the ground with their club, triggering a quick yellow shockwave; the second one is a similar move that triggers a slow pink shockwave; the third move is a belch without any effect. Clumphs are weak against the Firebrand technique; a Clumph may run away from battle if its hair (or wig) is set on fire. Nonetheless, a Clumph is a very powerful opponent, and usually fights to the end.
Clumphs only appear in Mario & Luigi: Superstar Saga, and even then they are not found outside of battle.
