Graffiti Runner is a minigame in the game Mario Super Sluggers. It takes place in Bowser Jr. Playroom. The goal of this minigame is to paint as much of the ground as possible with the Magic Paintbrush. It can be found in Treasure Chests, which can only be opened with a body check. Whoever gets the most points wins the game. Points can get acquired by painting the ground, body-checking another character, or obtaining an item. The player earns 10 points with each step when holding a paintbrush unless the player is walking over his or her area. 50 points are earned for each successful body check, and 100 points are earned for each item acquired.
The easier difficulties holds less chests than the harder difficulties. When players are playing in multiplayer, the max number of chests appear, regardless of CPU difficulty.