you have to beat the Elite 4 and he will return to mt.silver,but,his Pokemon grow 1 level every time
therapy
He disappears after you beat him
beat red and go to silph co.
Go to Kanto, beat the gyms, go to Mt Silver and beat Red.
no one knows but you can battle him again if you beat the elite four again.
you go to pallat town and go to prof.oak and get a Pokemon
go back too Mr.Pokemon to get an exp.share
Beat all the kanthan gyms and go to mt.silver and beat red
Beat the elite four again then go back to the top of mt. Silver
all you do is beat red and go to pallet town and go to his lab
you go to pallat town and go to prof.oak and get a Pokemon
I believe he just leaves and you never see him again