Nipper Plant is a small Piranha Plant that appears in multiple Mario and Yoshi video games. It first appeared in Super Mario Bros. 3 for the NES. They love to bite anything that seems to get near them.
In Yoshi's Island, Nipper Plants come from Nipper Spores. Yoshi can egg it and eat it, or even use a Fire or Ice Watermelon or use a POW Block. They also appear in Yoshi's Island DS.
In Super Mario RPG, the enemy, Nipper Plant is called Chompweed.
Nipper Plants later appeared in Super Princess Peach. Princess Peach fights them, instead of Mario or Yoshi. One subspecies of it is the Sad Nipper Plant.