Red looks to Dragonite, surprised by what he hears, but nodding to the pokémon before looking back to the professor.

"Sure, we'd love to help him train. But I didn't know you still battled, professor."

That he had a collection of pokémon again after all the work he and Green put into gathering them, that wasn't too surprising. But Red had always figured he was busy... professoring it, especially for training any for battle.