Hmm, this one may be too difficult, but...
Catch a Vullaby before Victory Road, name it Fettered. Fettered has been abused by humans who terrible Pokeball tests on it, and as such hates humans and does not want to battle pokemon. It wants to take revenge on humans, but the tests have given it bad eyesight, so it thinks that all pokemon who are humanlike are humans and will only battle them. It must solo all pokemon in the Human-like breeding group, and is not allowed to fight any other pokemon.
Catch a Vullaby before Victory Road, name it Fettered. Fettered has been abused by humans who terrible Pokeball tests on it, and as such hates humans and does not want to battle pokemon. It wants to take revenge on humans, but the tests have given it bad eyesight, so it thinks that all pokemon who are humanlike are humans and will only battle them. It must solo all pokemon in the Human-like breeding group, and is not allowed to fight any other pokemon.