Rival mode

Rival mode is a submode of Multi-Man mode in both versions of Super Smash Bros. for Nintendo 3DS and Wii U.

It involves the player competing for KOs against a CPU-controlled copy of their character. The player's final score is equal to their KOs minus the rival's KOs. The round continues until the player is KO'd: if the rival is KO'd, they simply respawn with no penalty aside from being absent for a few seconds. KOing Miis will grant the player a point, but KOing the rival grants the player three points.

This is the only Multi-Man mode not available to more than one player.

In Super Smash Bros. for Nintendo 3DS

 * Playing Rival Smash for the first time grants the player the Super Mushroom Hat headgear.
 * Getting a score of 10 or higher grants the player KO Healer Protection Badge equipment.
 * Getting a score of 50 or higher grants the player the Lv. 3 Recovery Power.

In Super Smash Bros. for Wii U

 * Getting a score of 20 or higher grants the player the Star Wolf (Star Fox: Assault) CD.
 * Getting a score of 85 or higher grants the player the Waluigi trophy.
 * KOing the rival 2 or more times grants the player the Super Mario Bros. 3 Medley CD.
 * KOing the rival 4 or more times grants the player the Ice Climbers trophy.
 * Getting a score of 25 or higher as grants the player the Guiding Bow custom move.
 * KOing the rival 3 or more times as grants the player the Dixie Kong trophy.