Looks like there's a Day-1 patch for Super Smash Bros. (3DS), only needed if you buy the retail version of the game (DL version is pre-patched). Looks minor, as you end up with ver. 1.0.1, but it does add online play. Update is 46MB (375 blocks)
It added a mode called Conquest, which will be unlocked on Monday at 3PM JST.
Basically, in online mode, Conquest sometimes triggers during a game. Each wins add points to a certain character, and at one point, players affiliated with the winning character will get some prizes. It's a bit like the Steam Summer Sale camp game. It's not active all the time, as once a Conquest session is over, it'll remain "dormant" for a little while.
Source
It added a mode called Conquest, which will be unlocked on Monday at 3PM JST.
Basically, in online mode, Conquest sometimes triggers during a game. Each wins add points to a certain character, and at one point, players affiliated with the winning character will get some prizes. It's a bit like the Steam Summer Sale camp game. It's not active all the time, as once a Conquest session is over, it'll remain "dormant" for a little while.
Source