>>58882537Eeeeeh
Kinda just worse Salamence, with situational uses, honestly.
Salamence can superman, and has some critical points in special attack, along with effectively better physical bulk.
Garchomp as a platform is really, really banking on that fast(ish) 130 stab Earthquake. Electric immunity isn't really that important in gen 3 ou, Chomp's anemic special attack fucks it in a couple HP interactions, and you just aren't running Dragon Claw. Fire Blast is good, Surf and Crunch are pretty meh. Brick Break and Rock Slide are unspectacular but fine. Swords Dance, assuming it can get it, would give it a niche, but I don't actually think it does, since the TM isn't in gen 3. I can't remember if it was a tutor move in gen 3.
Probably the biggest changes are Tyranitar is a less safe team building choice, but still really good, Raikou is even more rare, and more shit than already does packs Ice Beam.
Like it's still OU, but, Salamence is is kinda just better for most teams. Chomp actually does kinda need the split, or moves introduced later, to do as well as it does.
...all of this assumes it isn't just banned for Sand Veil on principle anyways. Just assume it has Stench instead.