Red Chomp

From Paper Mario Wiki

Red Chomps are mere chain chomps that are red. They are seen in the Glitz Pit and have high defense and attack. Their jaws are very powerful and can crack very hard substances. Red Chomps also seem to be hyper-active and are angry.

Goombella jokes that they went to a party, fell asleep, and someone spray-painted them red as a prank. This is probably why they're so angry all the time.