Been a while since I updated my HG team. Right now, I'm grinding at Mt.Silver to beat red.
lvl 56 Blast burn, flamethrower, smokescreen, will-o-wisp
lvl 59 ice beam, psychic, hypnosis, surf
lvl 60 agility, zen headbutt, stealth rock, meteor mash
lvl 58 extremespeed, fly, dragon dance, dragon claw
lvl 58 Bulk up, megahorn, shadow claw, brick break
lvl 60 crunch, thunder fang, dragon dance, stone edge
And a possible replacement for metagross is:
lvl 51 tri attack, discharge, nasty plot, shadow ball