Pokèmon stadium and Pokemon Stadium 2!!!!! I don't have much clue on how this game work's or how you play it, but i have played it and it is a good game.
The first thing i know is that it's pokèmon are exatcly like on the gb version's of pokèmon just the battles don't level them and also they knnow moves that they don't normaly know in the COmputer's pokemon selections. also the original stadium dosne't suport gold and silver vesrsions however pokemon sadium 2 supports all versions of pokemon including gold, silver, and Possibly Crystal. They also have virtualy the same Stats, however i recommend u use your own pokemon when they reach Level 50 or higher because you are acustom to useing your own pokemon's moves and how well they battle(Plus if you reaised them by hand their stats are higher).

Also the gym leaders are in the game aswell, as a a part of the regular game so you can unlock some speical modes Such as doduo and dorio modes. I would also have a good team before fighting them, they are not easy, there gamboy counterparts on gameboy are noting compared to these guys because you've got to go through alot of trainers to fight the gym leaders and they helaed automaticly(WIch is a plus), also there levels are alot higher. as a bonus for beateing the gym leaders and the elite 4 , there are many pokemon you could win too such as Extra eevee and surfing pickachu and there a possiblility you can win Mew out of it too. I'll have alot more info up here about Stadium and Stadium 2 as soon as my Re-do is completed(Wich could be a long while).