Dorimon

Dorimon (ドリモン)
A Lesser Digimon that can run very quickly, if it is going straight. It is often in a wild state because it hates to be domesticated, and it is dangerous because it will recklessly charge and perform a ramming attack if approached. Its ears have grown sharp and hard, and because they also act as horns there is some small damage from its ramming attacks, though it can't turn when going at speed. Its Special Move is spewing an iron bead out of its mouth while charging at the opponent (Metal Drop).

Etymology
Dori: From Doridori (ドリドリ‎), the onomatopoeia for drifting.