Bombat

Bombat is a Badnik that appeared in Sonic Rivals 2 and appeared in Sonic Rivals. In Sonic Rivals 2,to defeat the 2nd boss,when Eggman Nega's machine appears,and there's a Bombat,quickily destroy it (jump on it's head to destroy it).

Sonic Rivals
In Sonic Rivals,the Bombat appeared,but for some reason,you won't see it much.

Sonic Rivals 2
The Bombat appeared several times in Sonic Rivals 2. They were even there to defeat the 2nd boss.