Controls test stage

The controls test stage or customization test stage is a basic stage in Super Smash Bros. Brawl, Super Smash Bros. 4, and Super Smash Bros. Ultimate. that allows players to test their set custom controls character customizations. As such, it cannot be selected in Versus mode. In the controls test version, only Mario is playable. In the customization test version, the player can test any fighter they are customizing.

Layout
The stage consists of a single flat strip of terrain with a simple texture. On either side of the stage is an invisible wall that prevents the player from reaching the blast lines. These walls can be wall jumped from and wall clinged on, but do not interact with projectiles. In Brawl, it is not possible for the player to be KO'd on the test stage under normal circumstances, as the only character available,, cannot clear the walls and lacks any self-damaging attacks to launch himself with. In Smash 4, an invisible ceiling just above the camera boundary ensures that no fighter is able to reach any blast line.

On the controls test stage, pressing buttons will cause a small notice to appear on screen, containing an icon for button and its currently assigned function. In, controls can be customized using the bottom screen while the player is in the test stage. In Brawl and, controls are set on a separate screen. In Ultimate, a Sandbag was added to the stage.

On the customization test stage, a Sandbag is present for the player to test out their attacks on, and its damage is displayed on screen. The Sandbag's damage percentage will reset to zero if it does not sustain any damage for a few seconds. Due to the invisible walls, the Sandbag cannot be knocked out of bounds as on the Online Practice Stage. In Brawl and Smash 4, the Sandbag can not be grabbed due to it being an item (in Ultimate it can be grabbed) and other conditional moves such as counterattacks can't be tested as it doesn't attack. In addition, the Sandbag may have different knockback mechanics from some attacks in comparison to a regular fighter being hit by them, so comboing may be inhibited at times. In Ultimate, the player's damage percentage is displayed at the bottom if a Spirit Team is being tested.

Trivia

 * In for Wii U's customization test stage, if the player damages themselves significantly enough with self damaging moves (i.e. Toon Link's Short-Fused Bombs) and knocks themselves back towards either bottom corner of the room, the audience can be heard gasping collectively.
 * In Ultimate's customization test stage, can perform Kamikazee without KOing himself. When done, he will still shine and Sandbag will be damaged if it is close to the player, but the explosion sound and visuals will not occur, the shine will dissipate, and Hero will remain in the Kamikazee pose for a moment before suddenly landing on the ground (as he is in the air for a brief moment after usage).