Thread:Digifiend/@comment-24778794-20160912165219/@comment-691135-20160912193035

Deleted image of Zyuoh keys are it is fan-made. Also as DC said, anyone pre-Gokaiger who was a Sixth was categorized as such. Gai himself was clearly a Sixth. Ninjaman was not part of that, nor does he transform as the Kakurangers do, so at best he is an Extra Hero. Gokaiger also explains more or less why there was no ranger key for him, though a toy one was made.