Monster Hunter has a famously supportive community. Before using mods from any "lab + link," consider:
Put together: this looks like someone trying to share a of Monster Hunter Generations Ultimate for the Nintendo Switch, possibly with cheats, mods, or emulator-ready files. monsterhuntergenerationsultimatenspromslab+link
On the PROMs Lab site, use the search bar for "Monster Hunter Generations Ultimate." Monster Hunter has a famously supportive community