I am a great Lucario user. I have so many that I can try out all these movesets. And I have lots. Lots.
Anyways... here goes!
1st set:
Lucario @ Lucarionite
Ability: Steadfast
EVs: 4 HP / 252 SpA / 252 Spe
Hasty Nature
- Aura Sphere
- Calm Mind
- Flash Cannon
- Dark Pulse
Aura Sphere, Special Lucario's best Fighting move
Calm Mind, to boost Special Attack more!!!
Flash Cannon, Special Lucario's best Steel move
Dark Pulse, Ghost coverage. Need I say more?
2nd set:
Lucario @ Lucarionite
Ability: Steadfast
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Close Combat
- Iron Head
- Swords Dance
- Power-Up Punch
Close Combat, best Fighting move that Lucario can learn
Iron Head, Flinch chance + STAB and anti-Fairy/Rock coverage
Swords Dance, to boost that Attack stat more...
Power-Up-Punch, for more Attack and STAB
3rd set:
Lucario @ Lucarionite
Ability: Steadfast
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Drain Punch
- Bullet Punch
- Blaze Kick
- High Jump Kick
Drain Punch, STAB and recovery
Bullet Punch, STAB and priority
Blaze Kick, Grass coverage and annoyingness
High Jump Kick, for more STAB and sheer power...
4th set:
Lucario @ Lucarionite
Ability: Steadfast
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Drain Punch
- Poison Jab
- Swords Dance
- Zen Headbutt
Drain Punch, STAB and recovery
Poison Jab, good power, covers Fairies
Swords Dance, Attack boosting
Zen Headbutt, no one will see this coming. No one. Not one person will see this coming.
5th set:
Lucario @ Big Root
Ability: Inner Focus
EVs: 4 Atk / 252 Def / 252 SpD
Hasty Nature
- Force Palm
- Counter
- Drain Punch
- Me First
Force Palm, STAB, paralyze chance
Counter, to annoy lots of Physical tanks/sweepers
Drain Punch, Big Root usage...
Me First, to annoy lots. I mean lots.
6th (and last) set:
Lucario @ Lucarionite
Ability: Steadfast
EVs: 252 Def / 4 SpA / 252 SpD
Adamant Nature
- Metal Sound
- Nasty Plot
- Aura Sphere
- Magnet Rise
- Metal Sound, to annoy in an annoying way
- Nasty Plot, to be even more annoying
- Aura Sphere, because you wouldn't want that Special setup to go to waste, would you?
- Magnet Rise, no more Ground weakness XD
I have way more sets, but I'll be raged at for 4 sets, let alone 6, so I'll stop here...
Also, watch out for Ghost-types when using sets 2-6... they'll hit hard. I mean it.
Hope any of these helps!