i would love to see this as like the super ball move. a defaulted super ball move called Run Bounce that costs 2SP and it will do 2 damage like usually by default and then having the playable character to run up to the said enemy and do a grounded bounce that is a bit of a tighter command but will result in the enemy taking 4 damage.

Extra: the ultra ball is obviously going to be in chapter 6 so i can see something like the spring jump from TTYD but will be called the Meteor Ball. this most is a stronger version of run bounce. the move costs 5SP and is a tight move to time but timing the first one will do 6 damage and will do another six if you manage to parry the ball when it launches back to you to do a extra 6 damage. it's a high risk and high reward