All you have to do Is save when you get to him and soft reset until shiny
To catch Mewtwo in LeafGreen or FireRed no. To migrate Mewtwo from LeafGreen or FireRed to Diamond/Pearl/Platinum yes you have to have it in Diamond/Pearl/Platinum.
if your playing in a game boy advance,there is NO shiny mewtwo. but you can find a ordinary mewtwo in cerulian cave after you became the champ and get ruby and sapphire gem in one and six island.
You can find Mewtwo in the Cerulean Cave.
Yes there are shiny Pokemon in firered
I can't tell you the code for the shiny mewtwo because you did not say what game this is for. You can try the Pokemon Modifier with the Shiny code.
70
trade from firered
No.
Get a shiny (gold) Charmander in the beginning of firered ,shiny Pokemon evovle shiny
No. Actually, it means you are very lucky. What you have there is a shiny Mewtwo. Shiny Pokemon are incredibly rare: there's a 1 in 8192 chance of finding one. The fact that your Mewtwo is shiny is certainly incredible.
1. you cant catch mewtwo on ruby emerald or saphire<spelling mistake> you can migrate the mewtwo you catch on leafgreen or firered to migrate to platinum
no, firered or leafgreen