▲
2
▼
The game's reveal trailer on September 13, 2018 shows Mario being played in the levels "Waddlewing Warning!" and "Larry's Trigger Happy Castle". This is not doable in the final game as those are levels from New Super Luigi U, where Mario is not a playable character.
Reveal Trailer for New Super Mario Bros. U Deluxe:
https://www.youtube.com/watch?v=6wTFy-pJFMI?t=37
Evidence of the levels being from New Super Luigi U:
https://www.youtube.com/watch?v=VuT8JjMnVhM
https://www.youtube.com/watch?v=DNcegeMfLTc
https://www.youtube.com/watch?v=6wTFy-pJFMI?t=37
Evidence of the levels being from New Super Luigi U:
https://www.youtube.com/watch?v=VuT8JjMnVhM
https://www.youtube.com/watch?v=DNcegeMfLTc
▲
1
▼
By playing as Peachette in the final level of Peach's Castle, the real Peach will act confused before the fight plays as normal.
Related Games
New Super Mario Bros. U
New Super Mario Bros. Mii
New Super Mario Bros.
New Super Mario Bros. Wii
New Super Luigi U
New Super Mario Bros. 2
Mario Kart 7
Paper Mario: The Origami King
Super Mario Party
Donkey Kong: Original Edition
Yoshi
Sonic at the Olympic Games
Captain Toad: Treasure Tracker
Mario's Early Years! Fun with Letters
Mario Pinball Land
Super Mario Advance
Super Mario Advance 4: Super Mario Bros. 3
Game & Watch Gallery 4
Mario & Wario
Mario & Luigi: Bowser's Inside Story
Mario's Game Gallery
Super Mario Bros. 35
Puzzle & Dragons Z + Puzzle & Dragons: Super Mario Bros. Edition
Super Smash Bros. Ultimate
Mario Party 7
Mario vs. Donkey Kong: Tipping Stars
Mario vs. Donkey Kong 2: March of the Minis
Super Mario FX
Mario + Rabbids Sparks of Hope
Poochy & Yoshi's Woolly World
Mario + Rabbids Kingdom Battle
Mario's Time Machine
Super Mario Spikers
Super Smash Bros. Melee
Waluigi's Foot Fault
Mario Party: Star Rush
Mario Golf: World Tour
Donkey Kong Plus
Super Mario RPG: Legend of the Seven Stars
BS Super Mario Collection
Super Mario 3D Land
Mario Sports Superstars
Mario Kart 8 Deluxe: Booster Course Pass
Super Mario Bros. / Duck Hunt / World Class Track Meet
Luigi's Mansion: Dark Moon
Nintendo World Championships 1990
Super Mario Land
Yoshi Touch & Go
Mario Kart 8
Yoshi's New Island