How is it ethical to battle with Minior?

If you know how to properly administer aftercare for a minior and if the minior itself consents, then it’s perfectly ethical. The key is ensuring proper maintenance of your minior’s shell at all times. If it sheds this shell, recall it to its ball as soon as possible until you’re capable of giving it a dust or sand bath so it can feed and build a new shell. In other words, it’s a challenge and not something I would recommend to just any trainer, but it’s absolutely possible to give a minior a happy, full life and have it battle for you at the same time.