Glurp

From the Super Mario Wiki

A Glurp is a blue gelatinous enemy encountered by Mario and Luigi in Mario & Luigi: Superstar Saga. Glurps reside only in Joke's End and were resistant to Jump and Hammer attacks. The Glurps' only weakness was the Firebrand and Thunderhand attacks.

In battle, a Glurp can attack by charging up and spewing out a poisonous pink cloud at the Mario Bros. It can also just simply bite its target, lowering his defense. When damaged, a Glurp may split into two Glurps, but they will both have the same HP.

[edit] Foreign Names

Language	Name	Meaning
French	Whahac	"Whaha" is an onomatopoeia which implies laugh
German	Schleimgeist	"Slime Ghost"