The Mysterious Nine Project

The Mysterious Nine Project is the third game in the MXP series and the final one of the original trilogy consisting of The Mysterious Five and The Mysterious Seven Projects. As of April 15th, 2015, all nine members have been confirmed -- Exotoro, PabloDePablo, MeGa eXal, SuperSonicDarkness, Sr. Wario, GamingDylan, Pyrostar, Mirai Moon and Peppermint Princess.

In the My Music menu, the player can choose from nine theme songs for the game -- Fall Out Boy - "The Phoenix", (Dark's song), (Exo's song), (Pablo's song), (Dylan's song), Green Day - Basket Case, Nightcore - "My Demons", Project M Theme, and (Eve's song).

Gameplay
It's a Smash clone. Boop.

Single Player

 * TBA (Story Mode I): The Mysterious Five Organization enters a world known as the Novelty Dimension, where they meet the Novelty Nine.
 * In The Air Tonight (Story Mode II): The secondary unlockable Story Mode. Dexter goes back in time with the help of the goddess Oceanbird to stop the creation of Uncle Grandpa.
 * Forgiven, Not Forgotten (Story Mode III): The third unlockable Story Mode. This story stars obscure and forgotten warriors on their quest to become popular, but Dr. Doom stands in their way.
 * The Dead Kingdom - A giant dungeon filled to the brim with zombies and undead creepy crawlies. Get some loot and unlock some new characters!
 * Adventure Mode - A mode that pits you off against random challengers with random effects. There are also a few minigames. The final match pits you off against TBA.
 * Classic Mode - A mode that pits you off against challengers without random effects or minigames. The final match pits you off against TBA.
 * Regular Mode - A brand new mode. This takes place on one big stage, with you able to take on any opponents that you come across. Half-way through the mode you will encounter a huge change-up (reverse gravity, bad weather, nuclear attack...) that you must adapt to.
 * Blast to the Past - This mode is similar to Adventure Mode, but there are Time Gates on your paths that represent different time eras, such as the 70's or the 90's. This mode can be played to unlock trophies and possibly a new character. You go up against the Time Eater in the end.
 * Robot Rampage - A mode based off of the Super Duel Mode in Mario Party 5. Here, you face off in 3D battlefields unique to the mode, using mechas. You can customize your mecha using several parts from different franchises, which you unlock in other modes.
 * Battle Theater - This mode features gameplay similar to the Battle Theater games.
 * Like A Boss - Play as any boss from the game that you've battled and defeat all of the enemies.
 * Scripts - Choose a character and battle every other character, each match with their own conditions.
 * Slime Pit - Your character is trapped in a slime pit! Luckily the slime seems to be radiating power, filling up the super bar faster than usual. Take out armies of enemies with your super move!
 * Hotel California - Choose your character to check in for 122 straight battles in the increasingly reality-warped Hotel California, from the lobby help to a rooftop battle with Satan herself! As you progress, characters are more warped and more difficult to defeat.
 * Rhythmic - Go through your choice of Classic, Regular, or Hotel California with an added feature - all attacks are nerfed, and the only way to get back up to regular damage is to string combos to the beat of the music!
 * Quest Time - Go on quests for various NPCs in a huge big levels and explore various dungeons and towns to get glory, gold, and even new playable characters!

Multiplayer

 * Brawl - The standard mode. Up to eight people can play at once, using any of the following controllers: a Wii U GamePad, a Wii Remote (plus Nunchuck or Classic Controller), Wii U Pro Controller, GameCube Controller (requires adapter), Nintendo 64 Controller (requires adapter), or any system of the Nintendo 3DS family. Note that only a handful of stages can are comptaible with 5-8 player gameplay.
 * Robot War - A multi-player version of Robot Rampage.
 * Skyscrapers and Scorpions - A mode where one player plays as all stage hazards and enemies and the other players must beat him.
 * Slime Battle - Mysterious slime radiates powers, causing Super Moves to fill up over time faster than usual. Unleash the carnage.
 * Rhythmic - See who can complete Classic, Adventure Time, Regular, Blast to the Past, or Hotel California first with one rule - all attacks are nerfed, and the only way to get back up to regular damage is to string combos to the beat of the music!
 * Play Online - Title says all. Take yourself and/or your friends online to compete with fighters all over the world. See who is the best of the best!
 * Master Builder Fight - One player uses the Wii U Gamepad to mess around with the structure of the stage while players try to stay on while knocking the other players off.
 * Broadway - Scripts in Multiplayer Mode. Self explanatory.
 * Tag Team Mode - Fight with 16 characters, two for each player. You can switch to the other character at any time during the fight.
 * Umbrella Party - Similar to Brawl, but includes dice which when rolled increase the player's attack. The game also has random minigames. Players who collect the most stars from minigames at the end of the time limit win, but watch out, getting KO'd resets the star meter to zero.
 * WBAO 2K15 - Enter the ring in the Worldwide Brawling Alliance Organization Grand Melee Championship! You and your friends form a tag-team alliance, taking turns facing enemies in a Brawl match and climbing the ladder of wrestling success.
 * Let the Speed Mend It - A mode involving the gimmick of not being able to stand still; you must keep moving or rack up damage. Going extremely fast will heal your fighter.
 * Reverse Battle - This is the same as the normal Brawl mode, but with a twist, the winner is the first one that loses and the loser is the one that wins. Self destruct won't count as a win and simply will respawn you back to the stage, with the punishment of having more knockback resistant.
 * Free Fall Fight - This mode drops percentages, and instead hits slow them down. Players are falling the entire time and must evade hazards and pick up upgrades. Whoever falls to the ground first wins.
 * Battle Theater - This mode features gameplay similar to the Battle Theater games.
 * Riot - In this mode, you and fellow players must team up to start a Riot by using attacks on property and taunts. This will summon more people to riot and increase the "Progressiveness" meter. However, as things heat up, Police and Riot Police attack, taking out people and decreasing the "Progressiveness" meter. The mode ends when the Riot reaches full Progressiveness, and whoever got the most Progressive points wins.
 * Cosmic Crals - A game that works very similar to games like Galaga and Space Invaders. Up to seven players use Wii Remotes to take control of spaceships, shooting down aliens. Another player uses the Wii U GamePad to spawn power-ups, but can only do so three times every five minutes.

Trailers
The Mysterious Nine Project's trailers tell a condensed non-canon story similar to that of the game's main story. Most trailers feature multiple newcomers along with one or two veterans, but this is not a strict formula.

E3 20XX Trailer: Reveal
The trailer opens with clips from past games in the series, showing the Mysterious Five Organization defeating foes like Dr. Doom, Galactus, and Bill Cipher. Flashes of strange figures begin appearing before a sword slashes through the footage, revealing Ster Sabr surrounded by eight beings hidden in shadows.

On the surface, Inori Aizawa and Chuck D. Head are hanging out in their apartment when Ster Sabr breaks through the ground nearby. The two begin fighting him but are thrown aside and defeated. Soon afterwards, Dexter, Iron Man, and Emmet appear to fight Ster Sabr. The trailer ends with the five heroes charging at their foe, followed by the logo appearing on-screen.

B-Ballin'
The trailer follows where the previous left off, with the Mysterious Five fighting Ster Sabr. Suddenly, the sound of dribbling fills the air, and Slam Man appears, challenging the six too a match of basketball. They reluctantly accept, organizing into teams of Chuck, Slam Man, and Emmet against Ster Sabr, Inori, Dexter, and Iron Man.

With an obvious advantage in numbers, Ster Sabr's team begins dominating the match, despite Slam Man's prowess. Just as Inori is about to make the winning shot, however, a cluster of white blocks covers the goal as Qbby arrives to help Slam Man. With their new ally, Slam Man's team wins, leaving Ster Sabr angrier than before. In a post credits scene, Omiko Hakodate serves up a tennis ball that hits Ster Sabr, angering him further.

Story I: (Name TBA)
The main story mode. Not much is known about it, except that the Mysterious Five Organization enters a world known as the Novelty Dimension, where they meet the Novelty Nine.

This is the first main story of the MXP series that MeGa eXal will not be working on. Instead, he will work on a story all his own...

Story II: In The Air Tonight
This unlockable story mode is a humorous take on how several franchises, such as Sonic the Hedgehog, appear to get worse with every addition. It is named after the Phil Collins song of the same name.

In an alternate universe known as the Airverse, Dexter is sick and tired of today's Cartoon Network shows. A goddess known as Oceanbird sends him back in time to stop Uncle Grandpa from being created, but several characters stand in his way.

Story III: Forgiven, Not Forgotten
Completing In The Air Tonight unlocks a story written by Sr.Wario, Forgiven, Not Forgotten. This story stars obscure and forgotten warriors on their quest to become popular, but Dr. Doom stands in their way. This story is relatively serious.

Starting Characters
There are currently 65 characters.

Hidden Characters
There are currently 13 hidden characters.