Franchise: Super Smash Bros.

Pokémon Trainer is the only character that has a custom name in their original series to not be given a default name in Brawl, and is instead given a generic name. It is clear from the character design that the suitable default name would be "Red" as he is named as such in Pokémon Gold and Silver, and again in the remakes which were released after Brawl. The reason this was done is unknown.

Kirby uses a different dash attack in each of the first three Super Smash Bros. games. In the original Super Smash Bros., he performs a slide tackle. In Melee and Ultimate, he performs "Burning Kirby" (an ability seen in some Kirby games, and merged with the Fire ability in others), while in Brawl and Smash 4, he performs Yo-Yo Kirby's "Break Spin" from Kirby Super Star.

Pikachu is the only character in the entire Super Smash Bros series to only have four costume color options in the first three games.

The following fighters are the only characters in the Smash series to appear in another fighting game:

•Snake appeared in Dream-Mix TV World Fighters as a playable character.
•Mega Man has appeared in the Mega Man Power Battle series, a few Capcom VS games (mainly the Marvel vs. Capcom series) and Street Fighter X Tekken (in his "Bad Box Art" form).
•Donkey Kong also appeared in Punch-Out!! for Wii as a boss.
•Sonic appeared as a playable character in Sonic the Fighters and Sonic Battle.
•Link appeared in the GameCube version of SoulCalibur II.
•Little Mac appears in Punch-Out!!.
•Ryu and Ken are main characters from the Street Fighter series.
•Cloud appears as a playable character in the Dissidia Final Fantasy series.
•Terry is a main character from The King of Fighters series.
•Kazuya is one of the characters in the Tekken series.
•The Kirby series has its own set of spin-off fighting games called Kirby Fighters.
•Charizard, Lucario, Mewtwo and Pikachu appear in the fighting game Pokken Tournament.
•Min Min is one of the characters in ARMS.

In SSB and Melee the first syllable of "Samus" is pronounced /sɑ/ ("saw"). However, in Brawl, it's pronounced /sæ/ ("sah"). This change in pronunciation is consistent with the way Samus is pronounced in Metroid Prime 3: Corruption.

Jigglypuff's eyes are blue in the Pokemon series, but green in the first three games of the Super Smash Bros. series, the same color as a shiny Jigglypuff.

In all of her Smash Bros. appearances, Peach is depicted with a ring on her middle finger, which is absent in other games.

Snake's alternate palette swaps in Super Smash Bros. Brawl and Super Smash Bros. Ultimate are based on wearable camouflage outfits in Metal Gear Solid 3, such as the Fire camo and Spirit camo.

Both Ness and Lucas are unable to learn their Final Smashes (PK Starstorm) in their respective games. Instead, it's a move that both Poo (Ness' partner) and Kumatora (Lucas' partner) learn. In both Final Smash trophies in Super Smash Bros. Brawl, it says the partners taught them their respective moves so that they could use it in Brawl.

All lines spoken by Marth in Melee/Brawl/Wii U and 3DS are in Japanese. These are what they all are translated:

Marth's taunt - "Everyone, please watch me!" ("みんな、見ていてくれ！")
Marth's counter - "There!" ("そこだ！"), "I won't let you!" ("させるものか！")
Marth's victory poses - "This time, victory is mine, right?" ("今回は僕の勝ちだね。"), "Today, too, I managed to survive." ("今日も生き延びることが出来た。"), "There's no way I can lose!" ("僕は負ける訳には行かないんだ。")

He also has an unused sound file in the Debug Menu of the game which is "Let's Dance!" ("レッツダンス！")

Mario's Cape attack can be used on a taunting character to make them face the other way in ways that are otherwise impossible, like making Wario face the screen while doing his side taunt.

Peach's Final Smash since Super Smash Bros. Brawl is a piece of music from Super Mario Bros 3 that has been sped up. The music is from World 5: The Sky, Coin Heaven bonus levels and in the Warp Zone.

In an interview with Miketendo64, Nihon Falcom president Toshihiro Kondo stated that if Nintendo ever decided to ask the company to use one of its characters in Super Smash Bros., he would most like to see Adol Christin from the Ys series. His reasoning was that unlike many other characters created by the company, Adol has been the main character of several games and has been around for a long time. He also noted how unlike The Legend of Heroes: Trails series where the protagonist changes every arc (i.e. Van Arkride being the main character of the Calvard arc started in The Legend of Heroes: Trails Through Daybreak), Adol has had a consistent presence in his series, thus making him more recognizable as a character.

Though Donkey Kong's neutral special Giant Punch has no specific origin, Donkey Kong performs a similar wind-up punch in "Bad Hair Day", the first episode of the 1997 animated series "Donkey Kong Country", which first aired 17 months prior to the Japanese release of Super Smash Bros.

There are 17 stages in the Super Smash Bros. series that (intentionally) contain the full title of a video game in their English name: Balloon Fight, Duck Hunt, Find Mii, Luigi's Mansion, Mario Bros., Minecraft World, Pac-Land, Paper Mario, Pokémon Stadium, Pokémon Stadium 2, Super Mario Maker, Tomodachi Life, Wii Fit Studio, Wrecking Crew, both stages titled Yoshi's Island, and Yoshi's Story.

Additionally there are Miiverse and the Pictochat stages but their source material’s status as "video games" are debatable.

Ganondorf's design in Super Smash Bros. Melee is based on his appearance in the Spaceworld 2000 tech demo which showcased a fight with Link and himself where he wields a large sword. This large sword only ever appeared in that tech demo and in one of his win animations in Melee. This specific sword would not be used in Ganondorf's moveset until the release of Super Smash Bros. Ultimate in 2018, where his design is based on that same Spaceworld 2000 tech demo as well as elements from his appearance in The Legend of Zelda: Ocarina of Time.

In all games in the series since Super Smash Bros. Melee, you can choose which victory animation the winning character can do, though the button combinations differ by the game:

• In Melee, you can change the victory animation by pressing X, Y, or B before the result screen appears.
• In Brawl, holding either X, Y, or B, or Up, Left, or Right on the D-Pad of the GameCube controller will determine the victory animation.
• In the 3DS and Wii U games and Ultimate, holding Up, Left, or Right on the D-Pad will determine the victory animation.

Although he appears to be a flat sprite, Mr. Game & Watch is actually a 3D model designed to look 2D from the perspective of the camera.

When asked if they would approve of Cooking Companions content appearing in the Super Smash Bros. series, Deer Dream Studio said no, claiming "I've seen the best minds of my generation destroyed by Smash."

According to series creator Masahiro Sakurai in a 2024 video, ideas for the series' name were first brainstormed by team members at HAL Laboratory, while the "Bros." part of the name was picked out by its president Satoru Iwata during a meeting with him, Sakurai, and Ape Inc. founder Shigesato Itoi. Iwata's reasoning for adding Bros. to the title was that despite the game's roster not all being "brothers", he believed the word added the nuance that they were "friends who were settling a little disagreement" instead of just simply fighting.