Super Mario Bros. Zero

 is a Japanese-American platformer video game, being part of the  series. It is developed by and published by Nintendo, being released for Nintendo Switch Zero on June 14th, 2020.

Synopsis
Mario learns that Peach got kidnapped again by Bowser as he heads to a strange new kingdom known as the Shade Kingdom as he gains some new allies in the quest to stop Bowser.

Main

 * Mario (voiced by Charles Martinet) - a friendly and brave plumber who heads to the Shade Kingdom to liberate Peach as he is a brave and supportive hero.
 * Luigi (also voiced by Charles Martinet) - Mario's more cowardly brother who is forced to tag alongside him to his journey into the Shade Kingdom to save Peach.

Supporting

 * Princess Peach Toadstool (voiced by Cassandra Lee Morris) - the friendly princess of the Mushroom Kingdom who gets kidnapped by both Bowser and Thorn as her pure heart could be used by Thorn to power herself up.
 * Yoshi (vocal effects by TBD) - a little green dinosaur who can be summoned when Mario or Luigi hatch his eggs, which are somewhat plentiful in the Shade Kingdom as well.
 * Dizzy (voiced by Kira Buckland) - a nerdy and geeky librarian in the Shade Kingdom who finds and befriends Mario and Luigi, allowing them to stay in her library.
 * Eugene (voiced by TBD) - a grouchy crab-like creature who is Dizzy's partner as he doesn't like Mario and Luigi too much but still helps them out.
 * Captain Toad (voiced by TBD) - a cocky toad explorer who has somehow landed in the Shade Kingdom as he tries to help Mario and Luigi, yet fails.
 *  Black and White (voiced by TBD and TBD, respectively) - an eccentric brother and sister duo who both run a bonus room where Mario and Luigi can play mini games to get more lives and reserve power ups as they love having fun.

Antagonists

 * Princess Thorn (voiced by Carrie Keranen) - the cocky and malicious princess of the Shade Kingdom who can control darkness herself as she forms an alliance with Bowser to cover the world in darkness.
 * Eclipse (voiced by Kaiji Tang) - a giant hulking shadow monster who is Princess Thorn's bodyguard as he is loyal to his mistress and her goals.
 * Bowser Koopa (voiced by Ray Chase) - the villainous king of the Koopas who wants to take over the Mushroom Kingdom in a different way, forming an alliance with Princess Thorn.
 * Bowser Jr. (voiced by Erica Lindbeck) - Bowser's snotty son who wants to be the best son to his father, helping him with his plans to take over the Mushroom Kingdom with Princess Thorn.
 * Kamek (voiced by Dave B. Mitchell) - Bowser's second-in-command who is a powerful wizard as he stands by his master's side in his plans to work with Thorn.
 * Dr. Goombavokitz (voiced by Matthew Mercer) - an intelligent Goomba who wears a giant Mech suit as he gets sent to prevent Mario and Luigi from entering the Shade Kingdom.
 * Krakko (voiced by TBD) - a giant shadowy octopus monster who uses his eight arms as weapons as he is extremely hostile.

Gameplay
The game plays as a 2D platformer, similar to the classic games as you can select to play as either Mario or Luigi. The game keeps Mario's core moveset yet gives him both a slide and a double jump mechanic, allowing for more interesting platforming. Similar to 3D World, you are able to save powerups and use them in either a new level or when you lose all the power ups. Instead of having a map level select, there is an explorable 2D hubworld where Mario can talk to inhabitants, do mini games and do side missions which involves going to familiar levels but with a different goal in mind. The game also has two big collectibles hidden across the levels: Shade Keys which are used to unlock more worlds and one Light Bubble which can unlock a bonus level.

Trivia

 * This installment marks a departure in the franchise as now, rather akin to WarioWare Gold, it gives the characters more dialogue and using an unionized voice cast in an attempt to give it a new identity.
 * However, Charles Martinet was kept as his usual characters due to, as stated by Nintendo executives, his voice being so iconic it would be considered a crime to recast him.