That would be hilarious if you could breed in the middle of a battle.
"Hey man, why are you bringing a Ditto onto the field? We're in the middle of a battle here!"
"Sorry man, but I'm on a tight schedule. I don't have time to run to the Day Care, and I promised I'd give my cousin a Charmander for his birthday party this afternoon. Can we pause the battle for like, 3 egg cycles?"