Team Battle is a versus mode setting present in all the games of the Super Smash Bros. series. As the name suggests, players (whether human or computer) fight alongside others against the opposing team. Team Battle can be chosen on the character selection screen in the upper left hand corner by selecting the word "Free-for-all" in Smash 64, or "Melee"/"Brawl"/"Smash" in the respective games of the same name. Team Battle can be removed using the same method.
A team battle contains up to three teams (red, blue, and green), with a character's allegiance being shown by their color scheme or their outline color (Smash for Wii U/3DS). If two of the same characters are on the same team, they will be light or dark variations of the same color. In games prior to Smash for Wii U/3DS, the following team setups are available (not including those with only one player per team):
2 vs. 1
2 vs. 2 (also known as Doubles in competitive play)
3 vs. 1
2 vs. 1 vs. 1
Since team battles are a regular division of versus mode, the regular options of time, stock, and coin matches can be selected, along with Special Smash rules as well. In time and coin matches, the score (or coins collected) of each team is the combined score of its members and if they have the same total by the end of the match, then Sudden Death will occur. Stock matches are played in essentially the same manner; each player starts with a set number of lives and the objective is to deplete the stock of the opposing team(s). However, there is one feature called Share Stock where, when one player loses his/her last life, and that player has a teammate with two or more lives, he/she may borrow one of the lives from his/her teammate, and the character re-spawns as usual.
Team battle was also available for Nintendo Wi-Fi connection in Brawl. When playing with anyone, a player could select his/her character as usual, but his/her team color and teammate was determined randomly. Online team battles with anyone were always 2 vs. 2.
In Super Smash Bros. for Nintendo 3DS and Wii U, the character is no longer restricted to a single palette swap for team battles; rather, there will be an outline determining which player is on what team. When playing an 8-Player Smash in Super Smash Bros. for Wii U, an additional team color, the yellow team, can be selected. If a team with multiple characters wins, only one of the characters will perform a complete victory animation (the player with the highest score/stock count) and even then, only one of their animations can ever play, usually being the least special effects heavy (Mewtwo, for example, can only use the victory animation where it turns its head towards the screen after facing away, and can never use its other two).
With a maximum of eight characters that can participate in a match, further even-handed team setups are available beyond 2 vs. 2 battles:
3 vs. 3
4 vs. 4
2 vs. 2 vs. 2
2 vs. 2 vs. 2 vs. 2
Allowing for teams of different sizes, numerous combinations available, such as matches with up to seven fighters teaming up against a lone opponent, and matches with two large teams and one or two rogue contenders.
In 2 vs. 1 or 3 vs. 1 battles, despite there being only one opponent to attack, the Bully, Predator, and Stalker penalties will still be given out to the members of the multi-player team for only attacking a single participant.
Because Wario has two sets of outfits, each with its own team setup, he is the only character who has a choice of clothing in team battles prior to SSB4.
In Super Smash Bros. for Nintendo 3DS and Wii U, parts for the Dragoon and Daybreak are shared among teammates. If the item's other two parts were each picked up by other teammates, the teammate that picks up the last part--regardless of whether they have a part in their own possession--will have the item fully built and ready to use. Contrast teammates using the Dragoon in Brawl, where if two parts were picked up by different teammates, the Dragoon cannot be built as Dragoon parts cannot be dropped unless the players are damaged enough or KO'd.