Try to somehow acknowledge replacing Leer with Leaf Tornado in your post.

I wonder what happens if Spruce narrows his eyes.

Alright. Milloon's learned: Sonic Boom, Thunderwave
Celes: Quick Attack, possibly Bite
Joshua: Possibly Tail Whip, Bubble and Acid
Anthony: Possibly Protect, and Bide
Kamina: Tackle... just Tackle.
Tini: Twister and Dragon Rage
Hex: Bug Bite
Carrol: Rock Throw, Icy Wind
William: Possibly Fury Swipes, Feint, Odor Sleuth
Samuel: Possibly Quick Attack, Thunder Wave, Spark
Breen: Nothing, since he hasn't been fighting anything, or even training