Pak E. Derm
Pak Elephant Derm is an elephant-like creature that first appears in Yoshi's Story. Their shortened name, Pak E. Derm, is a pun on the word pachyderm, a term which is no longer in use; it refers to an obsolete taxonomic order of animals in biology that included elephants, whence Pak E. Derms' appearance was inspired.
In Yoshi's Story, Pak E. Derm holds up a sign and does not let Yoshi pass. To pass, Yoshi has to Ground Pound the ground, and the Pak E. Derm will fall away, allowing Yoshi to pass. Yoshi has to act quickly because Pak E. Derm will soon recover. Yoshi encounters Pak E. Derm three times throughout the first level, and it does not appear thereafter. Pak E. Derm's Message Block states, "Pak E. Derm will not let you by, unless you give something special a try."
Super Smash Bros. series
Super Smash Bros. Melee
Pak E. Derm also appears in Super Smash Bros. Melee as a trophy and in the background of the Yoshi's Story stage. According to the trophy, there is only one; also according to the trophy, he has been practicing the skill of holding the sign for years.
Super Smash Bros. Brawl
Trophy information from Super Smash Bros. Melee
Sticker information from Super Smash Bros. Brawl
Names in other languages