It’s in the mod - you can start with it. Haven’t seen it spawn… it’s possible he did what they did with Pokémon go - ditto is hiding as another poke. Can’t confirm the transform theory but can confirm it’s in game.

i was use the Simple Warrants to pay for them to capture and bring to me and was show up in the list my more like because what just say is they down spawn in world normal problem some plan add like clone mew to get mewtwo but they chance for fail and be a ditto more ether i got mew use this to check see has transform move and still didn't so still wounder on that bit if ever plan on actual make that move or wood be hard to code in rimworld also by all mean the warrant is not instant this pokemon mind now just bring wild to you that is bleed out so still need keep alive and make sure dont bleed on you side note rimworld of magic necromancer class is use have on handle if dont wanna your pokemon to die on you and all that if dont mind look like decay corpse or let go to next form to become alive again