User blog comment:Kogath/Monster Hunter: World Discussion/@comment-31029678-20190208002724/@comment-25119729-20190210100240

Citing TMNT crossovers as evidence means next to nothing, just because one series of fiction treats crossovers as canon doesn't mean another does. Unless they go out of their way to acknowlegde it as canon, it's a safer bet to think World crossovers are not canon.