I don't think that was ever an option, I'm afraid. Much like when I go to Canterlot High, being human is part of the package here.

[She shrugs apologetically, but honesty is the best policy, as Applejack herself would surely say.]

I'm a little more concerned as to where... everyone is.

[Everyone meaning their Pokemon, in this case. The only one she seems to have now is the curious little Deino poking her head out around her left leg to peer at AJ.]