*UPDATE* To my previous Post.
@Lord_Kimbou You need Pokemon Stadium 2(SPAIN) Rom it is in No Intro Set.
I previously said I could not get it to Boot However I forgot to try Modifying the File Header and Presto!!! The Game works so Pokemon Stadium 2 (SPAIN) does indeed work.
I used File Header from Pokemon Stadium 2 (E) and replaced via Hex Editor Pokemon Stadium 2(SPAIN) File Header.
;Pokemon Stadium 2 (SPAIN)
[RomOption]
;PlayerNum = 4
Rumble = 1
BackupType = 2
BackupSize = 1024
UseTimer = 1
[Render]
CanvasWidth = 640
CanvasHeight = 480
bForce720P = 1
1.Acquire Pokemon Stadium 2 (E) and Pokemon Stadium 2 (SPAIN) and a Hex Editor I Use HxD
https://mh-nexus.de/en/.
2.Extract Roms from Archive and now Open both Roms via Hex Editor and Highlight from Left to Right Line 1 to 4 at the right side and copy then paste in to the other and save. NP3P. is what you want at the end.
3. Do your Inject and use my Ini settings above [Render] settings are Optional. [RomOption] are Accurate with Optional Rumble but UseTimer = 1 is Essential or it wont Boot you can also add RetraceByVsync = 1 it may or may not give you a couple extra FPS.