I have a couple of Humanoid Flawless Stones, I have my rare Breed 4 Kun-Lai Runt, Flayers (Breed 4/5 and 7 rare), Stunted Yeti (found one rare), Upgraded Peddlefeet, and need Children's week to come around to get my Wolvar Pup.
So I was thinking of using one on a Sporeling Sprout. I have a Breed 4 and a 7, I generally favor putting a stone on Breed 4 when they are available, and the sprout has a "goes first" attack so there is not a reason I do not think for a speed breed.
I have never really battles with them though for tamers and such. Suggestions?