Event match (イベント戦, Event Battle) is a single-player mode found in Super Smash Bros. Melee, Super Smash Bros. Brawl, and Super Smash Bros. for Wii U. Event matches are challenges that place the player into specific scenarios with special conditions and a certain objective to meet, many of which pay homage to the characters and their history. Each game records the completion and "score" of each event match.
Event matches were introduced in Super Smash Bros. Melee, as part of the game's single-player mode. Only 10 are initially available to the player, with the rest appearing as the player fulfills a number of other objectives in the game. There are a total of fifty-one event matches in Melee.
A majority of Melee's event matches allow the player to select their character, although several of them require the use of an assigned character. Of note is that, with the exception of Pikachu, all characters in the Original 12 from Smash 64 have their own dedicated event match. Therefore, nearly all characters from the Original 12 (except Pikachu; who doesn't have an assigned event) are forced to be used at least once. The other 5 events (Event 25: Gargantuans, Event 32: Target Acquired, Event 34: Seven Years, Event 41: En Garde!, and Event 45: Game & Watch Forever!) are the only 5 events to have a Melee newcomer for an assigned character. Of these five, Event 25: Gargantuans is the only one that has one of Melee's newcomers as a starter character (Bowser). The other four newcomer characters are all unlockable characters for their assigned events (including Falco, Young Link, Marth, and Mr. Game & Watch).
Unique to Melee's event matches, compared to its other single-player modes, is that some matches require players and opponents to use an alternate costume.
Also of note is that no recovery items (like Food, Maxim Tomatoes or Heart Containers) appear in any of the event matches. However, Mr. Game & Watch's Judgement 7 can still drop a Food item to recover damage.
Unlockable event matches
Note: It is not required to defeat Giga Bowser in Adventure. Defeating him is only required to unlock his trophy. To unlock Event 51: The Showdown, the player must unlock all the unlockable characters, have completed Classic, Adventure, and All Star at least once, and have completed all other 50 events.
In Super Smash Bros. Brawl
A completely new set of 41 solo event matches appeared in Super Smash Bros. Brawl, alongside a separate set of 21 co-op event matches. Altogether, this brings to a total of sixty-two event matches. Brawl also introduced three difficulty levels for each event match: Easy, Normal, and Hard. The player starts with 10 solo event matches and 8 co-op event matches.
Unlike in Melee (where most of the events allow the player to choose any character), almost all of Brawl's event matches have an assigned character. Only the All-Star Matches (for solo events) and the final two solo and co-op events allow the player to choose any character. This appears to be done so that players are required to use nearly every character at least once; all 35 characters available from the character selection screen have at least one assigned event. Pokémon Trainer is considered a single character for his assigned solo and co-op events. Sheik doesn't have an assigned event, but can be freely swapped in for Zelda where applicable. As for the remaining two switched in characters (Samus and Zero Suit Samus), both characters have a separate event match (solo and co-op). Luigi and Jigglypuff lack an assigned solo event, but they appear as assigned characters in co-op events (Co-Op Event 11: The Great Remodeling Battle and Co-Op Event 16: Jigglypuff's Great Comeback, respectively).
As for stages, Super Smash Bros. universe stages like Battlefield and Final Destination (unlike in Melee events) are not considered home stages and so are not the assigned stage for any assigned event. Therefore, they only occur in two of the All-Star Matches (for solo events) and the final two solo and co-op events.
Unlockable event matches
Note: It is not required to finish The Subspace Emissary. The unlockable event matches can be unlocked by unlocking all characters through other methods.
Event matches return in Super Smash Bros. for Wii U; both solo and co-op. They function similarly to those in Brawl, but are now arranged on a map instead of a linear list. Completing an event will unlock paths to more events on the map. Each event will yield a reward if completed under specified conditions, such as playing on a certain difficulty and/or achieving a certain score. Additionally, scores earned will overwrite any inferior scores of lower difficulties; for example, completing an event on Normal difficulty in 30 seconds will also set the Easy difficulty's score to 30 seconds if it was slower or blank. Most events allow the use of customizations, but equipment that allows players to start a match with an item will have its extra effect negated; for an example, Beam Sword equipment will not allow the player to start matches with the Beam Sword in any event match. Players can now use different alternate costumes for most character-specific events by picking customized characters who wear them.
All event matches must be unlocked by completing other events, with the only exceptions being the starter events: "The Original Heavyweights", located in the center of the solo events screen, and "A Lurking Menace", located in the top-left corner of the group events screen. Some events also have "hidden routes" that become available if certain characters (or, in the case of The Ultimate Battle, all characters) are unlocked.
As for the maps below, each color represents rewards for each event completed. Yellow means gold, light green means a Crazy Orders pass, and dark green means a trophy. Any path showing a character's icon means that particular character needs to be unlocked before that event can be unlocked.
Event matches are absent from Ultimate. However, Spirits Matches (and stages from the World of Light) feature similar fights with unique conditions. In addition, fights in various fighters' Classic Mode routes have unique conditions similar to those of event matches.