i just started playing pokemon and im trying to beat the elite four. thanks for your help. heres my party

Charizard. lvl 52.bold nature
cut
blast burn
flamethrower
wing attack

Raichu. lvl 48. bashful nature
thunder
thunderbolt
mega punch
quick attack

aerodactyl. lvl 31. bashful nature. i put an exp share on it to keep on trying to boost it's level. i dont really use it much since it's weak
wing attack
fly
rock tomb
double edge

graveler. lvl 48. bold nature.
earthquake
rock smash
dig
rollout

dewgong. lvl 39. gentle nature. still training for the dragon person
surf
blizzard
aurora beam
sheer cold

machoke. lvl 47. hardy nature.
revenge
vital throw
strength
cross chop

thanks for your help

Keep leveling up your Pokemon, or else buy loads of revives, max potions etc. My advice for Charizard: cut Cut and Blast Burn, and replace them with Steel Wing/Iron Tail and Dragon Rage. I dunno, that's what I would do, see if you can get Reaper to help you, he's brill at team building

For in-game purposes, this is ok. Just keep levelling your pokemon to around 55 for the first wave of the elite 4 and 65 for the second wave.
For player vs player duels, this team will not do though.
Tell me if you are going to battle other players...if you do, I can help you improve their movesets.

if ur charizard has a higher sp attack give it dragon claw

u seem to underestimate the power of stat raisers and other non-attacks
give raichu thunderwave in place of thunder and a special attack other than electric in place of mega punch

a step up from rock tomb is ancientpower...then ahead of that is rock slide (but first you would need to learn how to breed)
please that is one ugly sight with fly AND wing attack. replace one with earthquake if you can spare it or if not steel wing/iron tail.

i suggest you change your graveler to another type because of the aerodactyl you already have. but, if your a big fan of earthquake maybe a steelix would do?

take out aurora beam and blizzard for ice beam, its more damaging than aurora yet far more accurate than blizzard. for annoying you could try double team and toxic.

evolve the machoke if all possible unless you are truly alone at this game. replace vital throw with bulk up, revenge with earthquake, and if it really likes you, strength with return

this is still a step towards a PvP class team even though i cant specialize as well as reaper :)