At long last, release day has arrived for Mario + Rabbids: Kingdom Battle. However, the release of a new game will sometimes see a day one patch come out. The reason is usually because there were last-minute bug fixes or, if the game was available to pre-load before release, the game needs to be unlocked for players to play. Whatever the reason, the Mario and Rabbids game is among those titles to get a day one patch, which sits at 94.3 MB in size. It is available now, if you have the game.