Nintendo released an update for Super Smash Bros. on December 16th in order to make DLC character Cloud available, but that patch also brought a lot of changes to the game’s balance. As usual, Nintendo has declined to release official patch notes, so dedicated fans at the Smash Boards have banded together to investigate and document all the changes.
Lots of players were tweaked this time, but most were not drastically changed. Some of the characters with the most changes include Shulk (who saw very small increases in power to almost all of his attacks, as well as reduced landing lag), Kirby, Mewtwo, Robin, Ganondorf, and Link. You can check out the full (unofficial) list of changes by clicking below.
Source: Smash Boards
Image: Nintendo Everything