Duelius Maximus

Duelius Maximus is a two-player mode found in the Variety Pack of WarioWare: Get It Together! It involves two players playing microgames until one of them loses all of their lives.

Gameplay
The players can choose between two modes: the Standard Round and the Lightning Round. If both players lose their last life from the same round, the mode will enter sudden death and the next person to lose a microgame will lose the battle.
 * In the Standard Round, players can freely choose crew members. The players will play microgames increasing in speed and difficulty, like in the main game and the Play-o-pedia. Players can start with up to four lives. It is the spiritual successor to Battle Time in WarioWare Gold.
 * In the Lightning Round, both players will get the same crew member at random for each round. If a player wins a microgame, their opponent's screen will freeze (if they have not already lost), making it impossible to win the microgame and thus guaranteeing the loss of a life. It is possible for both players to win at the same time, especially if it's a survival microgame (in which case one player is guaranteed a victory if the other fails). Players can start with up to eight lives.

Microgames become more difficult as the game progresses.
 * Rounds 1-8: Level 1 difficulty at increasing speeds.
 * Rounds 9-16: Speed resets in round 9; Level 2 difficulty at increasing speeds.
 * Rounds 17-24: Speed resets in round 17; Level 3 difficulty at increasing speeds.
 * Rounds 25-32: Speed resets in round 25; Level 3 difficulty at rapidly increasing speeds, reaching maximum speed in round 31. With the speed resetting in round 33, this process repeats after every eight rounds.