New Super Mario Bros. U Deluxe is an 2.5D platform video game for . The game has 164 courses and includes the and (both of which are games) expansion. Several voice clips are reused from and .
, , , and (both generically named in this game), and all return as playable characters from the original title while this game introduces a new playable character, , who makes her playable debut in the New Super Mario Bros. games. She has a unique form known as , which she obtains after grabbing a new item called the . The Peachette form grants her abilities similar to that of and
- - turns our heroes into the Super version of themselves, allowing them to punch and break blocks and to take another hit from an enemy.
- - turns our heroes into their Fire counterparts, allowing them to be in their Super form and hurl fireballs at enemies.
- - turns our heroes into their Squirrel counterparts, allowing them to be in their Super form and glide for an extended period of time.
- - With this transformation Mario and co. can hurl iceballs at enemies, freezing certain enemies, making a useful source. They're also in Super form.
- - Allows Mario and co. to become extremely small, allowing them to run on water, up walls, jump higher, and be very quick, but at the same time being very vulnerable (one hit and lose a life).
- - Turns Mario and co. into their Penguin counterpart, allowing them to slide on their belly and throw iceballs at enemies. They're in their Super form as well.
- P-Acorn - Similar to the powerup from , You can fly forever with the P-Acorn, and still support the physical characteristics of a squirrel.
- - Makes Mario and co. invulnerable and faster, but only for a limited amount of time.
- - A newer powerup that allows Toadette to become Peachette, no one else can use it but her, the Peachette transformation gives Toadette more agility, allowing her to double jump, and execute moves similar to Peach. This can end up unlocking a secret ending as well, if you beat the game as Peachette.
- - Gives Mario and co. a propeller which you can fly with.
