Shadow Mario Paint

Shadow Mario Paint is Bowser Jr.'s Final Smash.

Overview
When activated, Bowser Jr. will transform into Shadow Mario, and then paint an orange X on the screen. Anyone caught in the X's hitbox will take damage. Bowser Jr. will then be teleported above the top camera boundary and will be able to move around freely while the X is onscreen. The X deals knockback each time a character walks into it, and the knockback usually sends them towards the middle of the X, making it difficult to escape. When the attack ends the X explodes, dealing relatively high knockback. All hits taken from the paint have the same knockback regardless of damage until just before the X clears away.