Super Smash Bros. Brawl is a 2.5D crossover platformer-fighting game. The third installment of the Super Smash Bros. series (and the sequel to Super Smash Bros. Melee), Brawl continues refining the series' gameplay mechanics and revamping the roster (now including the addition of guest characters from series such as Konami's Metal Gear and Sega's Sonic the Hedgehog) while adding a brand new story-based campaign with side-scrolling platformer elements (called "The Subspace Emissary"), a custom stage builder, online functionality with the Nintendo Wi-Fi Connection service (including online multiplayer and uploads of replays, snapshots, and custom stages), new collectables (including "stickers" for an album), and time-limited demo versions of Virtual Console NES and SNES games (called "Masterpieces"). It is one of the few titles for the Wii that supports all available controller types (Wii Remote, Wii Remote with Nunchuk, Classic Controller, and GameCube controller).
The game's soundtrack features over 250 songs, most of them being new arrangements of other songs in Nintendo's history. It was arranged by 38 composers from numerous companies. Most music can be enabled as alternate stage themes for specific stages and are unlocked by collecting special hidden CD pickups that randomly appear.
The game's online functionality was later disabled on May 20, 2014.