Nintendo has updated Super Smash Bros. for Wii U and 3DS, but has offered little in the way of details on what's been changed. That's left it up to players to discover the minutae of what the patch does: Nerf Diddy Kong, among many other things.
Diddy Kong is widely regarded as being overpowered, and has been since shortly after this newest Smash Bros. first landed on 3DS last year. This led to serious concerns when it was announced in December that the game wouldn't be receiving any further balance patches.
And although Nintendo hasn't officially announced any specific balance changes for this 1.0.6 patch, players have discovered quite a few, which are being tracked on Reddit.
There are the mundane, expected changes, like the addition of Mewtwo-related content throughout the game, as well as new features like an option to trigger Smash attacks by pressing A and B simultaneously or an indicator that shows who's talking in an online friends match.
Then there are the actual balance tweaks. Quite a few characters have been changed in one way or another; Link's Up+B attack now does more damage, while Sheik's Bair now does less.
But it's Diddy Kong who appears to have been affected as much as any character. Many of his attacks now do less damage--Side-B grabs and kicks, up and down throws, certain air attacks--with the accompanying knockback they cause also being reduced. Whether that's enough to make players happy with him remains to be seen.
You can check out the full, continuing-to-evolve rundown on the patch's changes in this thread on Reddit.
Nintendo, for its part, did make note of the update in today's weekly press release on eShop releases, but it only called attention to two things: the need to update before playing online and the ability to buy new Mii fighter costumes. These include Link, Majora's Mask, and Mega Man getups, which can be had individually for $.75 each, in a 3DS/Wii U bundle for $1.15 each, or in a complete bundle for $6 (per platform) or $9.20 (for both platforms). You can see all of these in the gallery below.