Like many other games, the Super Smash Bros. series has had various rumors spread about it, usually through the Internet, and sometimes magazines. Most of the time, these will be about playable characters, though occasionally, a different sort of rumor will pop up.
Sonic and TailsThis is most infamous rumor about Melee. An April Fool's joke pulled by video game themed "Electronic Gaming Monthly" said that Sonic and Tails could be unlocked after defeating 20 or more enemies in Cruel Melee; upon completing Classic mode was either of them, it also claimed that the player would get a "special surprise". Multiple pieces of evidence debunk the myth; the method doesn't work, there is no data for the duo in the game, All-Star mode makes no accommodations for the two, and if all trophies are collected, the getting trophies by completing Classic mode with either would result in more trophies, making it impossible. EGM would later confess to making the joke, but as a prize for people who did get more than 20 KOs in Cruel Melee, they rewarded copies of Sonic Adventure 2: Battle, which was Sonic's first game on a Nintendo system.
Toad in MeleeAnother infamous rumor featured Toad as a playable character in Melee. The Toad rumor stated that Toad could be unlocked as a playable character in Melee after obtaining a perfect score during the credits mini-game (played after completing Classic Mode, Adventure Mode or All-Star Mode). There are also several fake screenshots depicting Toad in various in-game scenarios, propagating the rumor. The method has been disproved by the same methods as the Sonic and Tails Rumor; additionally, the screenshots of Toad were made by taking images from Toad when he was running around the Mushroom Kingdom of the Adventure Mode of the game.
Master Hand and Metal Mario in The Original
Videos all over YouTube have claimed to unlock Master Hand in Super Smash Bros, via spinning the control stick 30 times on the select screen. The only way to play as Master Hand is through a cheat device, such as an Action Replay. The same goes for Metal Mario, only by spinning the control stick 4 times, or occasionally 10. Multiple other rumors of other characters have appeared; the most well known of these are Raichu and Wigglytuff, though these rumors are less recurrent.
Clouds of Bosses
A popular theory states that at the beginning of the Subspace Emissary when Meta Knight's ship appears, various faces show when the ghastly clouds form. People have speculated this to be four major bosses throughout the game. This seems to be coincidence at best, much like Rorschach inkblot tests. Many people believe the four "faces" resemble Ganondorf, Master Hand, Bowser, and Ridley. As it were, all four characters were villains during the game, two being bosses. Many believed the Ganondorf cloud could have also been Mewtwo (Some have also seen a Mewtwo cloud), who is no longer a playable character in Brawl.
Ridley, Bowser Jr, and Wind Waker Link
At one point shortly after Brawl's announcement, a rumor began floating around that Ridley, Wind-Waker/Cel-Shaded Link (Toon Link), and Bowser, Jr. would be playable characters. There was also the rumor of Young Link, Ice Climbers, and Mr. Game and Watch being dropped. The alleged source was a radio interview with Masahiro Sakurai. This was proven to be mostly false, with the exception of Toon Link replacing Young Link. Ridley also appears as a boss and Bowser Jr. appears as a sticker and trophy.
No More Clones
Another popular rumor stated that Sakurai claimed clones will not be in Brawl. That would mean Dr. Mario, Roy, Pichu, Ganondorf, Falco, Young Link, and (to a lesser extent) Luigi, would be removed or redesigned for Brawl. Despite initially being unbelieved, this has has been proven mostly true. The majority of clone type characters have been differentiated compared to the level of similarity in Melee, while others have been dropped entirely; the only character who was not a clone that was removed for Brawl was Mewtwo.
Brawl is the Last Game
Sakurai has said that several things along the lines of that he was making Brawl like it was the last game, or that this would be his last game; additionally, some advertisements had the tagline of "One brawl to end them all!". This has led several to believe that this is the last Smash game. However, Sakurai has also said that Melee would've been his last game, and that did not come true. It is also very likely that whether or not Sakurai will be working on another game, Nintendo will most likely continue the Smash series regardless, due to its success.
At E3 on June 8, 2011, Sakurai confirmed there will be a new Super Smash Brothers for the new system Wii U, as well as the Nintendo 3DS. The two games will share some capabilities, intertwining.
The Third Third-Party
Sakurai said that, after Sonic and Snake, there might be a third third-party character. This lead many people to believe that it was certain that a third party would be in there. The two most popularly rumored characters were Mega Man, from his own self-titled series, and Geno, from Super Mario RPG. Some even believed that Geno was partially programmed into the game, but cut out due to Square-Enix not giving consent however this has been proven as after many hacking attempts they found a lost song in the list Geno's woods which most likely would have been his stage thus proving he was partially programmed in. The Mega Man rumor was disproved when the creator of Mega Man said that he would like to see Mega Man in Brawl, but Nintendo hadn't asked him or CAPCOM. It was also said that another CAPCOM character, Leon Kennedy, from Resident Evil, was in, due to his voice actor being listed on IMDB for a short time on the Super Smash Bros. Brawl page. However, this proved not to be the case, and that voice actor was either not performing for the game, or just voiced another character. Another rumored third party brawler named Bomberman was originally going to be in the game but Hudson didn't want him to be in Brawl for unknown reasons. Another rumored third party brawler was another character from the Sonic the Hedgehog series, such as Tails, Knuckles or Shadow (who turned out to be an assist trophy).
Leaked Brawl Image
Before Brawl came out, multiple images were found that resembled character screens filled with many of the most-wanted characters. However, just like other hoaxes, some of the character icons were copies of art from previous games (which Super Smash Bros. has never done), and so were confirmed as edited images.
Pichu returns in SSBB
The Pikachu in Super Smash Bros. Brawl has the same wall jump the Pichu from Melee had. Other factors, such as the Pikachu in SSBB being able to wear the Pichu's goggle costume from melee(as a recolor) and the fact that Pikachus can only learn Volt Tackle as a Pichu, have convinced a few people that the Pikachu in Brawl is the evolved form of the Pichu from Melee. However, this is less likely.
Tekken in SSB4
Since the announcement of Namco Bandai developing the next Super Smash Bros. game, there have been rumors of many Namco characters particulary those from the Tekken series, bieng playable characters in it. As of the time of publication there is no comfirmation or denial but is highly unlikely.
Super Smash Bros. Memories
A new rumour has been floating around regardless the 3DS version of the still in development Super Smash Bros. 4. This rumour comes from Zelda Informer, and it says that the 3DS version will be a throwback at the past of Nintendo, and it will have classic, retro characters like Pac-Man, Dig-Dug, Mach Rider, Stanley the Bugman among others, and that the Wii U version will feature the modern Nintendo. However, Zelda Informer is known for having a lot of false rumours in the past.