GB/GBC/GBA

SGB: No, it runs at the wrong speed.

SGB2: Yes, they fixed the speed problem.  However RNG manipulations designed for GBA will not work

SGB modded with the speed fix from SGB2: Yes, but doing this is probably less practical than Gamecube+GBP.

Wide-Boy 64: Yes, but good luck finding one.  Far less practical than GBP.

N64 Pokemon Stadium Game Boy Tower: No, it has a multitude of issues

Game Boy Player: Yes, it's identical to running on a GBA or GBA SP.

Game Boy Interface: Yes with GBI-SR.  GBI only replaces the GBP boot disc, so still identical to GBA or GBA SP in hardware.

GB/GB Pocket/GBC/GBA/GBA-SP potato cam: Yes

GBA on DS Phat or Lite potato cam or capture card: Yes

GBA Consolizer mod: ? Should work changing to original framerate settings but not leaderboard official.  Less practical than GBP

3DS Virtual Console: Yes but RNG is inaccurate, only practical for Classic categories

ROM injection into Virtual Console: No, VC is only allowed for official releases Red Blue Yellow/Gold Silver Crystal on 3DS.

GB/GBC on Gambatte-Speedrun: Yes

GB/GBC on any emulator other than official VC or Gambatte-Speedrun: No (this includes phone emulators, retroPi, etc)

GBA on mGBA: Yes

GBA on any emulator other than official VC (pinball) or mGBA: No

	DS

DS Phat/Lite/DSi/3DS/2DS/New 3DS/New 2DS potato cam or capture card: Yes

DeSmuME 0.9.11: Yes

Any emulator other than DeSmuME 0.9.11: No

	3DS

3DS/2DS/New 3DS/New 2DS potato cam or USB capture card: Yes

3DS via NTR CFW wireless capture: Not now, but soon

Citra 3DS emulator: Not now, possibly in the future

	Switch

Switch: Yes, dock it and either capture the HDMI out or potato cam a TV.

Yuzu Switch emulator: No

	N64

N64: Yes

Wii/Wii U VC: Yes

Emulators that aren't VC: depends on the game, generally N64 emulation should be avoided

	GameCube

Gamecube/Wii loaded via original disc in the original disc drive: Yes

Gamecube/Wii/Wii U via Nintendont: No, this enables loading without the original disc which is inaccurate

	Wii

Wii/Wii U: Yes, again only via the disc drive