Rate my OU team

Aerodactyl
Focus sash
Jolly
252 att/ 252 speed /4 hp
Stealth rocks/ taunt / stone edge/ earthquake

Pretty self explanatory,set up SRs and taunt other leads so they can't set up their own.

Forretress
leftovers
relaxed
252 hp/ 112 att/ 144 def
Toxic spikes/ rapid spin/ gyro ball/ explosion

I use this guy to set up toxic spikes and rapid spin hazards away if needed. I chose toxic spikes to mess up bulkier pokemon that can shrug off regular spikes and SRs. If everything works out I can use him to hit a few things and then explode when he's low on hp.

Breloom
toxic orb
adamant
12 hp/ 252 att/ 222 spe
Seed bomb/ spore/ substitute/ focus punch

Standard spore puncher. I also use it to put slower threats to sleep.

Flygon
choice scarf
lonely
252 spe/ 252 att/ 4 hp
Dragon claw/ earthquake/ u-turn/ fire blast

My revenge killer. I chose dragon claw over outrage because I don't want to be locked into it. Earthquake is my main STAB move.

Gengar
life orb
timid
252 sp.att/ 252 spe/ 4 def
thunderbolt/ shadow ball/ focus blast/ explosion

My special sweeper. I have explosion to take out weakened special walls like blissey. Gengar is also my spin blocker.

Lucario
life orb
adamant
252 att/ 252 spe/ 4 hp
Close combat/ extreemespeed/ stone edge/ swords dance

My physical sweeper. I switch into something that is harmless and set up a swords dance then extreemespeed most things I can't outspeed and use close combat when appropriate. Stone edge is for pokemon like gyarados and zapdos and sometimes salamence.

What do you guys think?

With SR+Toxic Spikes I'd fill the team with defensive Pokemon and PHazers rather than offensive Pokemon and go for a stall team. With that being said if you do decide to go for a stall team, one of the Rotom Formes would be a better Spin blocker. Also, don't use Toxic Spikes and Spore Breloom on the same team, since a Pokemon can only have one status ailment at a time.

Yeah I just realized the Spore + TS thing, I'll probably just go with regular spikes.

well 3 pokemon on the team are weak to fire i would be scared of that weakness especially since your safe switch for fire type moves does not appreciate taking multiple stab fire hits

(3 fire blasts from a heatran and flygon is gone) and once flygon is out of the discussion your entire team is swept by heatran (You will facepalm when that happens)

timid weakens explosions power. change the nature (if you can)

I am thinking of either replacing Lucario or Breloom. What do you guys think?

i would get rid of the breloom and replace him with a special attack based pokemon because you only have one and that is gengar. maybe a milotic would be a good choice, you could do a aqua ring leftovers strat.