"Okay," Tony said with a contemplative sort of look, "we're talking more about that regeneration thing later. Let's not unpack it this second."
But he was sort of getting on this symbiotic relationship thing, it was genuinely interesting to think about considering it was incredibly unlike humans to make those sorts of connections. The long lasting effects it could have on the world as a whole were -- vast. Everything was probably cleaner, less pollution. If this place had rainforests, they probably weren't in danger of disappearing.
He was town away from his thoughts by the Doctor demanding training and Pokeballs.
Luckily for them, everyone and their uncles were so exciting about Pokemon that it wasn't hard getting what they wanted and finding someone (embarrassingly and endearingly, a small kid volunteered to show them the ropes, going out to some tall grass outside and expertly catching a little bird all while explaining it).
And then they were bogged down with Pokeballs, all stuffed into a bag Tony had had to buy, and he was turning the thing around in his hands in wonder. "This is--" He got it now, why she was amped up to high levels. This technology was fascinating and wildly advanced.