All my friends are mythicals.
This would concern me more if it didn't fit a reasonable pattern.
Unfortunately that pattern points in an unusual direction, mythologically speaking.
Like a bunch of Goodra scooped up from the wilds after people emptied their pokeboxes ending up in a cult to Quetzalcoatl, the rainbow serpent.
Short answer is it doesn't make sense.
You don't want the long answer.