Selserene's Comments

Scooter is a very underrated battle pet vs tamers.  His large health pool makes him a tank.  Using Absorb, Shell Shield, and Dive this pet can nearly solo the Kun'lai Summit Grand Master, Courageous Yon, and kills the Pandaren Earth Spirit's pet of the same name swiftly.

This little guy is particularly strong against Aki the Chosen, the Grand Master in Vale of Eternal Blossoms.  Use nothing but his Dreadful Breath ability against her cricket, Chirrup, until her dragon Stormlash is dead.  Combine the Feral Vermling with a pet that casts Cleansing Rain and Dreadful Breath will kill both Stormlash and Whiskers, leaving only Chirrup to finish off.  Using this method you can level two pets up against Aki the Chosen with ease.