The Japanese study Comcept announced in day of release in the U.S., and just a few days before the release of the Xbox 360 version, Mighty No. 9 was postponed for "several days" after a major bug has been found in testing.

The bug has already been fixed and sent back to certification, but this means that holders of the old console Microsoft will have to wait a little longer to be able to play. For everyone else, however, will come punctually on 24 June.