Per the leaderboard rules--
Allowed Emulators: Preferred: Project64 v1.6.x Alternate: OpenEmu Alternate: Mupen64Plus
All other emulators and versions (such as Mupen64 and Project64 v1.7 & v2.0+) are banned. Using a Mupen64Plus core within RetroArch is different from vanilla Mupen64Plus and is banned. Any ROM modifications or emulator settings that cause non-vanilla behavior are banned (e.g. widescreen)
Short answer: mobile emu=banned, I remember asking if an emulator was allowed since it was the vanilla experience but on mobile and the answer was "its a mobile emulator so no" even if it was literally a official nintendo emulator ported on mobile (which we all know wouldn’t happen) they’d still ban it. I guess they’re scared of getting their wr stolen by a dude on his iphone.
I mean no one is stopping you from running on mobile... You just can't submit to the boards.