Boost Rush

Boost Rush is a mode featured in New Super Mario Bros. U and its Nintendo Switch remake. In Boost Rush, the player will play through a series of levels grouped together in packs, and the objective is to play through autoscrolling levels and collect the most coins, lose the least amount of lives, and make or beat the best time. The speed of the scrolling increases every ten Coins, while Star Coins are worth 20 coins each. Like in Story Mode, the player has limited lives and can gain more by collecting coins or extra lives, although all players share the same lives, and the player using Boost Mode can pop any players in bubbles. When a player is playing Boost Rush, Miis can be seen in the background, supporting the players.

While playing the Penguin Pack, all Ice Flowers found in the levels are replaced by Penguin Suits.

New Super Mario Bros. U

 * Instruction manual bio: "Play through a series of courses back to back, and try to clear them as quickly as possible. In addition to being able to play as Mario and friends, you can also play as Mii characters."
 * "If you've created a Mii character in the Mii Maker™ application, you will be able to select your Mii character. For more details, please launch Mii Maker and read the electronic manual from the HOME Menu."

New Super Mario Bros. U Deluxe

 * North American website bio: "Rush through courses that scroll at increasing speeds as you collect Coins, and aim for the fastest possible completion time."