Nintendo outlined its plans for online play in Super Smash Bros. earlier this month, revealing that gameplay will be split between casual-focused "For Fun" and tournament-styled "For Glory" modes. Nintendo also announced that the 3DS version of Super Smash Bros. will feature a new dungeon-diving Smash Mode that replaces the Wii U's traditional Adventure Mode.
Super Smash Bros. will launch for the Nintendo 3DS this summer. A Wii U release will follow in the winter.
Super Smash Bros. (Wii U, 4/17/14)
Smash Smash Bros. (3DS, 4/17/14)