I'm interested in getting into speedruns and wanted to do this and Castlevania 64, I've emulated both using a 360 controller and own a console but strongly prefer the 360 controller to the n64. For official any% speedruns is it legal to use emulators or non-n64 controllers?

CV64 allows PJ64 v1.6 for emulation, so you can submit to that leaderboard if you wish.

SM64 allows PJ64 v1.6 for emulation, so you can submit to that leaderboard if you wish.

Worth noting that these are just the rules set up by mods on those individual leaderboards. If you prefer to run those games using a 360 controller, then do so.

Also if you have any questions about CV64 feel free to ask us here: https://discord.gg/S3FS8c9

When the rules dosen't specify this, than do it. Sure it should be obvious that emulator specific features are not allowed, like savestates. Also important that you are only allowed to do things, that the stock controller can do. Sure some 3rd party controllers have a turbo button or even macros but that is not allowed.

It's always good to check the rules for each category. in SM64 in the extended Category's, you even need to activate gameshark codes (ex. Non Stop Category). Sure these are specific runs.