Issue with Super Smash Bros. for Wii U software update released on April 15th 2015
A software update is now available that fixes this specific error. We sincerely apologise for any inconvenience.
An issue has been found in the most recent software update for Super Smash Bros. for Nintendo 3DS / Wii U. This issue affects users who redeemed download codes for Mewtwo, which were distributed as part of the Super Smash Bros. Club Nintendo Promotion, in either version. We sincerely apologise for any inconvenience.
After using Mewtwo in Smash Run (a mode exclusive to the Nintendo 3DS version), Classic, All-Star, Stadium, or Trophy Rush, and then connecting to the internet in the game, your Global Smash Power may be incorrectly identified as unauthorised data. From this point on, it will not be possible to connect to the internet from within the game.
We are currently preparing a software update to rectify this issue. Until this update is available, we recommend users refrain from using Mewtwo in Smash Run (a mode exclusive to the Nintendo 3DS version), Classic, All-Star, Stadium, or Trophy Rush.
No issue has been identified with using Mewtwo in the following modes: Smash, Online, Smash Tour (a mode exclusive to the Wii U version).