<P> At E3 2013, Sakurai stated that the tripping mechanic introduced in Brawl had been omitted, with him also stating that the gameplay was between the fast - paced and competitive style of Melee and the slower and more casual style of Brawl . While the game does not feature cross-platform play between the Wii U and 3DS, due to each version featuring certain exclusive stages and gamemodes, there is the option to transfer customized characters and items between the two versions . The game builds upon the previous game's third - party involvement with the addition of third - party characters such as Capcom's Mega Man and Bandai Namco's Pac - Man, as well as the return of Sega's Sonic the Hedgehog . This involvement expands beyond playable characters, as other third - party characters, such as Ubisoft's Rayman, are also included in the game as trophies . The addition of Mii characters was made in response to the growing number of requests from fans to have their dream characters included in the game . To prevent potential bullying, as well as to maintain game balance online, Mii Fighters cannot be used in online matches against strangers . The decision to release the Wii U version at a later date from the 3DS version was made to allow each version to receive a dedicated debugging period . Hardware limitations on the Nintendo 3DS led to various design choices, such as the removal of mid-match transformations, the lack of Circle Pad Pro support, and the absence of the Ice Climbers, from the NES game Ice Climber, who were previously playable in both Melee and Brawl . </P> <P> In late August 2014, a series of allegedly leaked photos and videos of the 3DS version were uploaded to the Internet, revealing at the time several unannounced fighters . The original videos were removed shortly thereafter citing a copyright claim by Nintendo of America . These leaks were confirmed on September 11, 2014 when various gamers in Japan and Taiwan obtained the 3DS version two days prior to its release date and streamed footage of the game on Twitch . </P> <P> Like previous games in the series, Super Smash Bros. for Nintendo 3DS and Wii U features many original and re-arranged musical pieces from various different gaming franchises . Both versions have multiple musical tracks that can be selected and listened to using the "My Music" feature, including pieces taken directly from earlier Super Smash Bros. titles . The 3DS version features less music altogether than the Wii U version however, and only has two songs per stage because of size limitations . The 3DS version also has a "Play in Sleep Mode" option, allowing players to listen to the game's music from the sound menu whilst the system is in sleep mode . </P> <P> Various well known video game composers and musicians such as Masashi Hamauzu, Yuzo Koshiro, Yasunori Mitsuda, Motoi Sakuraba, Yoko Shimomura, Mahito Yokota, Akari Kaida, Michiru Yamane, Koji Kondo, Kazumi Totaka, and Hiroshi Okubo, among many others, contributed arrangements for the game, while the original score and other arrangements were from Bandai Namco's in - house sound team . A two - disc promotional soundtrack, featuring certain selections from the game, was available for Club Nintendo members who registered both versions of the game before January 13, 2015 . </P>

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