In Pokémon Red,I had three or four years,my big brother telled me that if I use a Master Ball on a Pidgey i will be able to get MEW,but that I have to stop buying balls,and when I went to catch Mewtwo he defeated my entire team(Blastoise,Pidgeot[yeah,I actually evolved the pidgey],Dragonite,Taurus,Raichu and Arcanine) just using Psychic.
But,after that I started all over again,and,with my friends help.I was able to get all 151 pokémon,and my brother only got 45,and his starter ''suddenly disappeared"
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Hacks I support:
Pokémon Grape Version(I can't put the link,so search!)
Pokémon Platinum Red and Blue(I can't put the link,so search!)