Users with strong pets probably won't put them up for adoption. Leveling up takes a lot time and sP (even CSC). You might be better off leveling up your own pet(s). Good luck, though.
I agree with what everyone else has said. xD I'm currently training all of my pets and it drains my bank account and takes up a lot of my time. :o I suggest you just train your own pet, that way you won't have to worry about finding a pet with a nice name/color/species. n.n