Question

What is the difference between VGC and Battle Stadium?

I have read various sources and commenters state that it is Singles-vs-Doubles, or Console-vs-Simulator, or Ladder-vs-Tournament, and in either direction too. I can't pin down a good/authoritative answer, and I'd like some help finding definitive reference(s) as to what the difference both is and isn't.

Comments

Not a full answer, but https://www.smogon.com/dex/ss/formats/battle-stadium-singles/ https://www.smogon.com/dex/ss/formats/vgc22/
Both of them are on console.

Answer 1

Battle Spot singles is a 3V3 singles format. This means that you are only allowed to send out three of your Pokemon(out of 6). It is Nintendo's official cartridge format. It has a 10 minute battle timer.
Source
VGC is 4V4 doubles format. You are allowed to send out only 4 of your Pokemon (out of 6). It is Nintendo's official tournament series. It has a 20 minute time limit.
Source
They both follow species clause, item clause and auto level Pokemon to level 50. Both formats are played on console.