What to use
@ Life Orb
EVs: 252 Atk / 4 Hp / 252 Spd
- Close Combat
- Bullet Punch
- Swords Dance
Physical Sweeper, Late-game Cleaner
What it does:
Lucario, with the banning of genesect, is having his own little coming out party in the ou metegame. Lucario is an amazing sweeper and cleaner that after one boost can often spell gg for the opponent. With its amazing steel/fighting typing Lucario has many chances to set up a swords dance such as, choice locked dragon, ice and rock moves which are all incredibly common. ExtemeSpeed is the main selling point of Lucario and one of the huge reasons to use him over any other fighting type (unlike terrakion he can actually beat techniloom because of this). It hits many, many pokemon with neutrality and after one SD can one hit a majority of them, especially late game. Close combat is busting down steels and walls such as magnezone, It can even 2hk0 skarmory. Bullet punch may seem like an interesting choice but I really prefer it in this metagame, as you can beat the very common terrakions and gengars of the world.
When it comes to support, Deoxys-D and lucario go hand in hand. Extremespeed, albeit fast, isn't backed up by stab and has middle of the road base power. That's where deo-d's spikes and stealth rock support come in, making a e-speed sweep much, much easier. As far as taking out his counters mamoswine is a good candidate, beating both gliscor and dragonite. T-Tar can also be a great partner, especially choice band with its ability to easily dispose of jellicent. Strong wall breakers/sweepers that attract choice locked ice or rock moves such as dragonite and landorus also make great partners.
What counters it:
Gliscor is one of its best counters, shrugging off its main stabs and taking extremespeed pretty handily. Hippowdon is also a solid counter, taking any of lucarios hits with ease and hitting back with a super effective earthquake. Jellicent is another pokemon that compeltely walls lucario.
I highly suggest Deo-D support. (Or just spikes and stealth rock in general!)