Secret Smash

Secret Smash is a co-op event match in. In it, player 1 controls and player 2 controls  and must defeat another  and  in a stock battle on the Gamer stage. The players have 1 stock while the opponents have 2. If either player is defeated, the event results in a failure. On the stage during this event, 5-Volt is extremely powerful and has a strong chance of an OHKO.

Progression
This event is unlocked by clearing Flat Fracas and unlocking. Completing the event does not unlock any further paths.

Completing the event on hard difficulty awards the player with the Sprinter Collar equipment.