The Doctor's not interested in her question. Missy would answer that his companions and friends are his pets. But for himself, he doesn't know. So instead he looks at the brochure.

"Ah Pokémon. I once flooded an entire entry level of a building with them. Pretty easy when they're digital and you're a scary handsome genius from space."

He sits down next to her with a grin showing he's quite pleased with himself.