It was released as a VC game as a while before it got taken down, am I allowed to submit runs on 3DS?

If you don't get a reply by tomorrow. I'd try asking one of the mods on Twitter etc. I have that version too. Just no real way to properly record it without it just being a camera pointed at the screen. Thus, I used an emulator.

I assume a webcam pointed at the screen would be fine anyway. I just want to know because I can definitely get WR in these categories :p

I'm sure it's fine. Worst case, you'd just have to do it on emulator or something. So just record/stream it and turn it in.

As far as I know the 3DS vc is true emulation. The only arrangement that is explicitly banned is Super Gameboy for the SNES since the framerate is faster (1.02x)

I don't think SGB is even emulation though, it's an interpreter or whatever. Anyway, thanks for this. I'll try to record a video, but it's super hard with my hands overlapping most of the screen (I'm using the opposite hands to play faster :p).

I will say, the whole webcam thing is apparently looked down upon o.o

Some comments from me on those topics:

3DSVC is 100% software emulation, optimized for fluid display on the 3DS - i.e. not optimized for accuracy to the original release platform(s). My own testing has shown that 3DSVC runs original GB games at around 100.17% speed - which is significant enough to warrant a time conversion, especially since there are accurate emulators out there that don't have that issue. Please note that the analysis only focuses on bare clockspeed and not on differences in loading times or lag.

Pointing a camera at a handheld screen is generally acceptable as long as the gameplay can be seen well enough. It's obviously a suboptimal solution, seeing how many alternatives there are out there, but it's better than nothing.

SGB2 is - along with the Game Boy Player for Nintendo GameCube - the established standard for GB speedrunning. In the casual community it might very well be fairly unknown, simply because accuracy and comparability is not a crucial factor. However, in the GB speedrunning community this is (mostly) common knowledge. ;-)

If you're (general you) streaming GB speedruns on Twitch, there's a high chance that someone from the GB speedrun community will show up in your chat in no time and point you in the right direction. It's a small community, but a very caring one that is willing to help. If you have any general questions, feel free to contact me on Discord (Oh_DeeR#2685), since that would lead this discussion off-topic.

I'm sorry but if you're due to be homeless in half a month I don't think you should be spending your time speedrunning or starting up a website... you probably won't be able to keep it up after the donations run out, and I seriously doubt they would last more than a month or two at the most.