Chandelure could extend its top flame by hanging on to something off the top screen and sway back an forth, attacking enemies while rising and dropping.
Elgyem can do some sort of mind wipe that lights the screen up sort of like classic aliens do, and your enemies currently around him will stay temporarily dazed.
The Kami trio (Tornadus, Thundurus, and Landorus) can basically just fly around and shoot projectiles out of their clouds like twisters, lightning, and rock slides.