Anyway, pertaining to the General Metagame, here's my question:
How well would Agility Lucario do in this metagame?
I've ran calcs and he can outspeed Tornadus-T and Scarf Terrakion after +2 in Speed. With Adamant Nature and Life Orb, he can 100% OHKO them with Ice Punch and Close Combat Respectively. I've ran other calcs (go look for yourself,
http://honko.byethost8.com/manly_calc.html) and with some prior damage and Entry Hazards Support, he can work quite well IMO. Running Double Dance would be nice but then again, Lucario will get that chance once in every ten battles? Anyways, Discuss :)
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You know this is a decent question Tabuu. I was also wondering if this idea was a bit too chimerical for the fast pace BW 2 meta. So as an pretty regular OU player I will state the basics of why Agility Lucario is an ok choice and a poor choice in the current metagame. He's always been good late game. Without the power of +2 attack from Swords Dance Lucario has never really been able to do much with just agility unless it's late game. Pokemon that he can kill late game are the following: Landorus i, non Bulky Landorus T, 75% or less hp Gliscor, Latios, Garchomp, Haxorus, Heatran, Terrakion, Keldeo, Tyranitar, weakened Pokemon of course, Ferrothorn, Gengar, Salamence, Blissey, mamoswince, jolteon, magnzone, Dugtrio, Kyurem forms, and heck other Lucario. That's a nice list, but of course it's not intirely realistic, because Lucario takes damage from Stealth Rocks, Spikes, Life Orb damage, hopefully not too much damage setting up, and Close Combat lowers his defenses. This means that he can only do so much before getting in range of priority attacks such as mach punch (from the start), extreme speeds, bullet punches, and aqua jets.
Counters and checks to specifically Agililuc: Reuniclus, latias, full health Gliscor, Landorus T can intimidate then switch out or kill depending on switches, Jellicent, Jirachi, Scizor's bullet punch has always done significant damage especially when Luc is -2, Breloom, Azumarill, Tentacruel, Bulky Toed, CB Dnite (especially if it has multiscale obviously), Skarmory, Forretress, and last but not least Conkeldurr. There is great room for late game sweeps, but too much that will constantly get in the way. As far as Agility/ RP users Lucario is outclassed by Landorus i and Terrakion.
So for the negetives you could say he has a surfeit of counters/ checks, unless you've played a great game Agility Lucario is easily revenged, prone to be attacked by priority moves (some of which can nearly OHKO from the start, due to his low defenses), walled by some of the pokemon above if they are at full health, and not the easiest set to get away with. Some times weakened Pokemon that you set up SD Lucario stay i to mitigate the sweeping potential Lucario has, so without priority moves it makes Lucario an even bigger priority target. I personally wouldn't use Agili Lucario, but unexpected twists can often lead to a victory and if your team is built well with a spinner ( or just a way around getting set up by multiple layers) and the opponent is expected SD Lucario and get surprised it could be in your favor. Lastly he's a complete waste against a stall team, which SD lucario is perfect for breaking through. In the end a team is all about synergy and I know you can say that about any pokemon that can potentially sweep, but Lucario is very strong so as long as you get that one opportunity it could be devastating in most matches.
I don't like to deter people from being creative and certainly not with a set that has great sweeping potential, however I hope this helps you make your decision.