Bumpty in Yoshi's Story.
|Series||Mario series, Yoshi series|
|First game||Super Mario World 2: Yoshi's Island (1995)|
Bumpty is a race of penguin-like creatures, seen primarily in the Yoshi series, but also in the Mario series. In the Yoshi series, they are enemies which they bump into Yoshi (hence the name), making him bounce across the ice.
As far as the Mario series goes, they are primarily seen in the Paper Mario series. In Paper Mario, they live in Shiver City, while in Paper Mario: The Thousand-Year Door, some have moved to Poshley Heights.