Wohoo, one of the cards I voted on gets picked first! :biggrin:
Anyways, Lucario GL I think is one of the best cards to come out in the RR set. Statwise, 80 HP is still great for a Basic, x2 Weakness to
sychic: isn't that great with decks like Gengar (and myabe Gallade 4) out and about, no Resistance, and costs a cheap :colorless to Retreat. Boundary Aura is, simply put, an awesome Poke-Body, acting exactly like a Lake Boundary. Unlike Lake Boundary though, Lucario GL is infinitely easier to search out and can't be moved out of play like a Stadium; you must either KO him (which isn't easy since he's meant to sit on the bench) or shut him down some other way, like with Dialga G Lv X (which not all decks use). By using Lucario GL, this also frees up space for you to play your own Stadium alternatives, like Galactic HQ for SP decks and the like. Lucario GL's only attack, Combo Throw, isn't that great; :metal::colorless:colorless (or :colorless less with Energy Gain attached) deals a rather weak 30+ 10 more for each Energy on the defending Pokemon. As many top tier decks use minimal energy to deal the most damage, Combo Throw just won't ever be damaging enough to make a difference most of the time.
Modified - 9/10 (A great tech for any deck that wants to deal double damage with Weakness)
Limited - 8/10 (Combo Throw isn't as bad, and Boundary Aura should help you in getting quick KOs)
Unlimited - 1/10 (Most Pokemon used here already have x2 Weakness, so it's a bit redundant)