-When jumping, press the up arrow right before landing to deal extra damage! -When using the hammer, press and hold the left arrow until the red circle lights up, then release it to deal more damage! -When the enemy is attacking, press the down arrow right before the enemy attacks to reduce the amount of damage taken.
I know, this isn't necessarily "hard", but that's fine. Also, thanks to Brad-Games for making Paper Mario Battle Creator 2 (The thing I used to make this battle)!