I just beat Rainbow Rocket in the game. The plot was nonexistent and didn't make any sense, but honestly, it was meant to be fanservice anyway, so I'm fine with it. Honestly, it was probably the best part of the game. Rainbow Rocket was pretty fun. And lol, during the first battle, you battle alongside Lillie and her Clefairy. I was getting irritated by her stupid Clefairy, so I used my Incineroar to OHKO her Clefairy first.
And they weren't kidding about the shiny rates in Ultra Space. I caught six shinies there.
Also, caught a ton of legendaries.