Diamondwolf is one of Ben's Most Used Alien. Ben 10,000 uses him at dire situation that is when attacked by powerful energy blasts. Bomb Voyage likes him and tries to steal the alien. Diamondwolf's Sonic Howl could blast off an atomic glass at a second. HE is a Petro-Loboan from Planet Petropia.
Petro-Loboans might have been revived in Ben 10 -Secret of Chromastone.