there is no torment mode.
To unlock Mewtwo, play in VS. Mode for either 20 hours (Combined VS. Play Time total), or play 700 matches in that mode. After either requirement is met, Mewtwo will challenge you; beat him.
No but you can rent a Mew. Complete all the Stadium modes, the Gym Leader Castle, and beat Mewtwo in the VS Mewtwo mode and you will be able to select Mew as a rental pokemon in the Prime Cup mode.
Be Jigglypuff And Pikachu In Adventure Mode
Beat classic mode with anyone on very easy then defeat jigglypuff, beat classic mode with 13 of the original characters then defeat young link and marth, beat classic mode with marth then defeat roy, beat the first adventure mode stage with a 2 in your seconds For Example: 3:32:99 then defeat luigi and defeat him again at the end of adventure mode, finish the 100 man melee mode then defeat falco, beat the legendary Pokemon event then defeat pichu, beat the triforce gathering event then defeat ganondorf, play in melee mode for 50 hours or 5 hours with 4 human players then defeat mewtwo, beat classic mode with Mario then defeat dr Mario, play 1,000 melees or beat classic mode with mewtwo or finish target test with all 24 characters then defeat mr game and watch.
Beat adventure mode with pikachu and jigalipuff
you need to do adventure as pikachu and jigglypuff
Anovia would recommend using Mewtwo for All-Star Mode.
Play on melee mode for 50 hours! Or 5 hours with four human players.
Play 1,000 matches or beat classic mode with mewtwo.
Mewtwo is not a Rental pokemon in pokemon stadium the reason for this is because there is a VS Mewtwo mode in the game and so his place is taken up there instead of in Free Battle. To use Mewtwo you must use the transfer pak accessory with Red, Blue or Yellow version inside then you must enter the Mewtwo you catch in the game then you can use him all you want but he will never be a Rental pokemon only Mew will.
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VS Mewtwo is not in Pokemon Stadium 2 instead a VS Rival mode was made for the game. The Rival is the rival from Gold, Silver and Crystal officially named Silver.