This is pretty cool. What’s more, I suspect the same sort of ‘DNA’ trick could probably work well for a couple of later artificially created Pokemon too. Like Genesect and Type: Null.
Makes me think about how Niantic could let people encounter other rare or legendary Pokemon from later generations. Like the legendary golems/Regi trio (their original unlock methods involved reading braille and doing somewhat odd things like using cut on a wall or waiting for 2 minutes). Or Deoxys (appeared from space in a meteorite). Or the Ultra Beasts from Pokemon Sun and Moon (appeared from portals in missions in place of the normal wild Pokemon).