>>58905491I take it the "rainbow" part of the name is a reference to Alola having lots of rainbows. My headcanon is that multiverse-hopping Giovanni incorporated numerous members of Team Rocket from other worlds but they had a different color for the "R" on their shirt, so Rainbow Rocket is the combination of all of those Rockets.
Currently writing a very autistic fanfic where they're the big bads lurking in the background. The final battle is a straight ripoff of Avengers Endgame but it sounds fun to write so fuck it