Super Smash Bros. for Nintendo 3DS / Wii U

Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U are both versions of the upcoming fourth installment of the Super Smash Bros. series being developed by Sora Ltd. and Namco Bandai Games. Each version has a different release date due to the time that it will take to finish each one.

Gameplay
It has been confirmed that the Final Smash and Footstool Jumping features are returning from Super Smash Bros. Brawl, while the "tripping" mechanism has been removed and the game's Adventure Mode will be significantly different than the Subspace Emissary. It has also been stated that players will be able to send customized fighters from one version to the other, that attack directions will be customizable , and that the pace of battles will be in between Super Smash Bros. Melee and Super Smash Bros. Brawl. The game will not make use of the touch screen controls that both systems support during gameplay.

Smash Run
A new mode, Smash Run, has been confirmed to be a Nintendo 3DS-exclusive mode, strongly resembling the City Trial mode from Kirby Air Ride while including elements of the Subspace Emissary mode from Super Smash Bros. Brawl. In this mode, players travel in a large maze-like map, fighting enemies from both Nintendo games and from Super Smash Bros. games, such as Magikoopas, Chandelures, Goombas, Shy Guys, and Kremlings. While fighting, players can collect several items similar to patches. These patches can increase attack power, special attack power, jumping, and movement speed. After five minutes, players are shown the stats of their attacks, courtesy of the patches they collected, and they are pitted in several modes, similar to the Stadiums from City Trial. The players then must fulfill certain conditions to win the game.

Playable characters
Due to limitations with the Nintendo 3DS version of the game, certain characters from the previous installments in the series might be cut from the rosters of both versions in order to keep them consistent. So far, 29 characters have been confirmed, consisting of 23 veterans and 6 newcomers. Unlike previous games in the series, Sheik and Zero Suit Samus are standalone characters, rather than an in-game transformation.

Character movesets

 * F.L.U.D.D. (Mario attack)
 * Toad (Peach attack)
 * Luma (Rosalina attack)
 * Pikmin (Olimar attack)
 * Rush (Mega Man attack)
 * Lloid (Villager attack)
 * Navi (Link taunt)
 * Phantom (Zelda attack)

Stage cameos

 * Shy Guys in Karts (Rainbow Road)
 * Lubba (Mario Galaxy)
 * Lumas (Mario Galaxy)
 * Kotake and Koume (Gerudo Valley)
 * Alfonzo (Spirit Train)
 * Loftwings (Skyloft)
 * Viridi (Reset Bomb Forest)
 * Nintendog (Beagle) (Living Room)
 * Kapp'n (Tortimer Island)
 * Tortimer (Tortimer Island)
 * Leila (Tortimer Island)
 * Dr. Shrunk (Town and City)
 * Gracie (Town and City)
 * Crazy Redd (Town and City)
 * Lloid (Town and City)
 * Frillard (Town and City)
 * Labelle (Town and City)
 * Saharah (Town and City)
 * Wendell (Town and City)
 * Pelly (Town and City)
 * Mabel (Town and City)
 * Timmy and/or Tommy Nook (Town and City)
 * Dark Emperor (Find Mii)

Stage bosses

 * Ridley (Pyrosphere)
 * Yellow Devil (Wily Castle)

Smash Run enemies

 * Goomba
 * Stalfos
 * Tac
 * Kihunter
 * Reaper
 * Met
 * Poppant
 * Tiki Buzz
 * Roturret
 * Bulborb
 * Chandelure
 * Mimicutie

Stages
According to Masahiro Sakurai, both versions of the game will feature different stages. The Wii U version will mostly feature stages based on games released on home consoles, while the 3DS version will mostly feature stages based on games released on handheld systems. In the Nintendo 3DS version, each stage has only two tracks that can play, whereas the Nintendo Wii U version will have a comprehensive list similar to My Music from Super Smash Bros. Brawl. Additionally, the stages in the Wii U version all feature a "Final Destination" variation in addition to the normal one, being a flat course with no obstacles or other platforms.

New items

 * X Bomb
 * Hocotate Bomb
 * Steel Diver
 * Beetle
 * Bottled Fairy
 * Ore Club
 * Cucco
 * Gust Bellows
 * Spiny Shell
 * Rocket Belt
 * POW Block
 * Fire Bar
 * Back Shield
 * Bombchu
 * Super Leaf
 * Master Ball

Returning items

 * Capsule
 * Smash Ball
 * Ray Gun
 * Assist Trophy
 * Green Shell
 * Fire Flower
 * Poké Ball
 * Trophy
 * Home-Run Bat
 * Banana Peel
 * Bumper
 * Motion-Sensor Bomb
 * Crate
 * Rolling Crate
 * Beam Sword
 * Smart Bomb
 * Bunny Hood

Assist Trophies

 * Skull Kid (New)
 * Nintendog (French Bulldog)
 * Starfy
 * Ashley (New)
 * Mother Brain (New)
 * Waluigi
 * Andross
 * Isabelle (New)
 * Metroid
 * Devil
 * Knuckle Joe
 * Saki Amamiya
 * Lyn
 * Dr. Wright
 * Midna (New)
 * Dark Samus (New)
 * Chain Chomp (New)
 * Elec Man (New)
 * Color TV-Game 15 (New)

Nintendo 3DS

 * Saria

Wii U

 * Little Mac (as he appears in Captain Rainbow)
 * Phosphora

Pokémon

 * Palkia (New)
 * Dedenne (New)
 * Xerneas (New)
 * Arceus (New)
 * Meowth
 * Electrode
 * Eevee (New)
 * Staryu
 * Metagross
 * Fennekin (New)
 * Meloetta (New)
 * Gogoat (New)
 * Entei
 * Deoxys
 * Kyurem (New)
 * Victini (New)
 * Keldeo (New)