Nyaromon

Nyaromon (ニャロモン)
A tiny Digimon which has cat-like characteristics. It is always capricious, and that behavior seems to have been attached to Nyaromon as a result of its being like a "cat". Although it is sometimes frivolous due to its overflowing curiosity, it also has a lonely side. Its Special Move is puffing up its tail, making the hairs like wires and then striking the opponent (Fox Tail). However, there has never yet been an opponent observed to flinch from this attack.

Etymology
Nyaro: Comes from nyaa (にゃあ~), which is the sound cats make in Japanese.