Maybe you don't understand much of what I'm going to say, because I'm Brazilian and google translator doesn't help much
My opinion is about the custom pet, I think it should be traded or put up for sale.. many want to have a custom pet, they ask me how they get it, but they cannot afford $ in the game.
I have 4 custom pets and I only use one, if I could sell or trade I would, but it's impossible..
maybe it's a possibility for players who want to have one and can't