I do believe Red goes to Sinnoh. After you beat Round 2 of the Elite Four, however, he'll re-appear at Mt. Silver and you can battle him again. However, with every battle you have with him, his Pokemon get one level higher.
beat the elite 4 again then go back to Mt Silver
you have to go to prof oak and get rock climb and then get to the top of mount silver and battle red. he has Pokemon level 80-90 about so he is not easy.
you must first beat red at the top of mt. silver then go to Mr Pokemon. But only if you have heartgold.
go left of the city
Go to Kanto, beat the gyms, go to Mt Silver and beat Red.
therapy
you go to pallat town and go to prof.oak and get a Pokemon
you have to go through mt silver and fight red/Ash.
you go to pallat town and go to prof.oak and get a Pokemon
You beat red in MT. sILVER
Beat all the kanthan gyms and go to mt.silver and beat red
after you beat red[in mt silver] , go to prof oak and he will give you a Pokemon
He jumped off mount silver because he lost.
yes you can that guy is super wrong what an a**hole you can beat the Pokemon league again and then go back to mt.silver and red will be there!
Go get a bunch of potions, and keep using them when your Pokemon's HP is low.
I believe he just leaves and you never see him again