Definitive pre-final-patch version – recommended over Rev 0, but not over fully updated digital copies for online play.
Finding Rev 9 is tricky. Look at the inner ring of the disc or the back of the case (small black text). Super Smash Bros. for Wii U -USA- -EnFrEs- -Rev 9-
Specifies the NTSC-U/C region coding, designed for consoles in North America and Canada. Super Smash Bros. for Wii U -USA- -EnFrEs- -Rev 9-