How does Lucario have an "easy time setting up?" What can he force out? Also, a common mistake made is to let Lucario force something out if you indeed have something that can be OHKOed by +0 Lucario out. It's better to sacrifice something to cripple it. If it uses SD, you can kill it with Excadrill or Tyranitar or paralyze it or something. Let's see what Lucario can set up on from the top 50:
My commentary is behind "-"
Rotom-W: no, Will-O-Wisp - WoW isn't too strong, when he can use AURA SPHERE
Aegislash: no, Sacred Sword - CHECK
Talonflame: no, Brave Bird or Flare Blitz or Will-O-Wisp - probably CHECK
Genesect: no (only when stuck to Ice Beam, which is rare) - not so rare at all
Greninja: no, Hydro Pump - He might OHKO him with Vacuum Wave (low chance) and he might survive Hydro Pump (chance that it isn't OHKO and chance that it misses) - CHECK if lucky
Charizard: no, fire moves - CHECK
Lucario: no, fighting moves - are you kidding?
Heatran: no, fire moves - Heatran is probably OHKOed with Aura Sphere
Gliscor: no. - If lucky, CHECK, if not, Ice Punch or HP Ice
Garchomp: no, Earthquake - CHECK
Azumarill: no, Play Rough or Waterfall or Superpower - CHECK
Scizor: yes - he might have Superpower
Ferrothorn: yes - YEAH, playing Ferrothorn make you lost
Tyranitar: depends. Can be forced out but you can also kill Lucario if he chooses to set up while you use EQ or Superpower. - are you kidding? Aura Sphere and he's gone
Conkeldurr: no - probably... CHECK
Excadrill: depends, for some reason as TTar. - Aura Sphere, gone
Dragonite: depends. It depends on Dragonite having Multiscale on and Lucario having Ice Punch. You can also keep Dragonite on Lucario in case it uses SD.
Venusaur: no. He's a good Lucario counter with Sleep Powder. - SLEEP CLAUSE, he might predict Sleep Powder, then you asleep another Pokémon, GG
Mandibuzz: no, uses Whirlwind. - assuming you play whirlwind... wouldnt help you so much
Gengar: no. Outspeeds Lucario on turn 1. - CHECK
Espeon: no. Outspeeds Lucario after mega evolving on turn 1, crippling him. - yeah, because every espeon runs CONFUSE RAY
Mamoswine: depends. - depends if Lucario carries STAB? 252 HP Mamoswine is OHKOed by Close Combat, Aura Sphere and Flash Cannon
Goodra: no, can take a hit and OHKO Lucario.
Alakazam: no.
Landorus-T: can take an Ice Punch and kill Lucario.
Togekiss: no, paralyzed. - However 2HKO by Bullet Punch...
Skarmory: no, Whirlwind. - yeah, but loses nice amount of HP from Aura Sphere
Breloom: no, Mach Punch.
Infernape: no, outspeeds Lucario on turn 1.
Volcarona: no. - assuming you had enough time to deal with SR
Gyarados: no. Good Lucario counter.
Latios: no, outspeeds on turn 1. - but not KILL him
Mawile: no. owned by Play Rough.
Trevenant: no. Will-O-Wisp. - no. Nasty Plot...
Cloyster: eh, depends on Shell Smash being used. - not good argument, probably same argument as depends on Nasty Plot being used. - OHKOed by Aura Sphere, enough time to set up Nasty Plot and use Vaccum Wave
Pinsir: no. - CHECK
Blissey: yes.
Sableye: no, Will-O-Wisp. - no. Nasty Plot (yeah he might have taunt, but what if there is Swords Dancer... you have to guess right)
Smeargle: depends I guess? He's not really something you set up on because he has a Sash and Spore. He cripples Lucario if Sticky Web is up.
Sylveon: yes.
Klefki: no, Thunder Wave.
Clefable: no, Fire Blast. - playing fire move doesn't mean he is dead. Clefable isn't usually Modest.
- 4 SpA Clefable Fire Blast vs. 0 HP / 4 SpD Mega Lucario: 204-240 (72.5 - 85.4%) -- guaranteed 2HKO
- Clefable is 2HKOed... or Nasty Plot/SD and super-effective STAB... he set up great
Donphan: no, has Sturdy and Earthquake and is a tank. - CHECK
Galvantula: no, same situation as Smeargle but he has some strong attacks.
- 252 SpA Galvantula Thunder vs. 0 HP / 4 SpD Mega Lucario: 195-231 (69.3 - 82.2%) -- guaranteed 2HKO - really STRONG...
- 252 SpA Adaptability Mega Lucario Aura Sphere vs. 0 HP / 4 SpD Galvantula: 139-164 (49.4 - 58.3%) -- 98.8% chance to 2HKO (Nasty Plot and then OHKO with it, he had enough time to set up, if Galvantula isn't playing T-wave)
Starmie: no, is always faster than Lucario. - CHECK
Tentacruel: depends on luck. Tentacruel can tank a hit from any +2 move Lucario has to offer, so he can use 2 Scalds, crippling Lucario a lot with a good chance to burn. - Might be check, might be sweeped.
Forretress: yes.
Bisharp: depends on whether Bisharp is +2 when Lucario comes in. - not really, you predict badly attack and uses Sucker Punch without effect, then you get sweeped with +2 Vacuum Wave... if lucky, he will kill you straight way
Salamence: no.
Thundurus: no. - might cripple, yeah
Playing RED-MARKED Pokémon make you LOSE to Lucario, because he will have enough time to set up Nasty Plot or Swords Dance and pretty much SWEEP your team.
BOLD-MARKED means they're CHECKs - they can defeat him if standing on the field against him, but cannot be switched into...
BLUE are COUNTERS... yeah, there's only one.
Your tactic is probably to sacrifice Pokémon before Lucario set up SD or NP... yeah useful, but he might switch and in good moment return, then you have to sacrifice another Pokémon... untill you loses. You lost, but you did your job well, Lucario sweeped your team unboosted due to your sacrifices, fucking useful.
CHECK is not reason for letting him being in OU.
COUNTERS are the reason. So let's everyone play Gyarados -.-