Ability Ideas

Freeze enemy to block water current
Ground pound bounce pads, higher redirect and exclusive
Dash reflect mush have a quick angle option
Maybe make dash roll into mario blue shell
Player make platform, bubble mario/cloud
Water power up grow things like vine
Look into roll jump VS crouch long jump
Jump from top of poles. Bowser kingdom
Holding dash into to redirect shinespark
Use grapple to activate platforms, like cappy
Ledge grab, slide off Ledge with grab pressed to grab before falling off
ledge grab, but needs to auto move when holding direction
step over 1 tall ground
phase through walls, Celeste Strawberry Jam

Stacking stronger upgrades is fun?
Dk 64 slams, just new color
Metroid weapons, interesting mechanics

Mario Powerups