Lucario

[nimzowitsch]

Base Stats: 70 HP / 110 Atk / 70 Def / 115 SpA / 70 SpDef / 90 Spe
Abilities: Inner Focus/Steadfast/Justified
Notable Moves:

Swords Dance
Extreme Speed
Close Combat
Meteor Mash
Crunch
Ice Punch
Earthquake
Bullet Punch
Agility
Nasty Plot
Aura Sphere
Focus Blast
Flash Cannon
Vacuum Wave

Pros

• Swords Dance+Extreme Speed
• Inner Focus prevents flinching and Attack drops from Intimidate
• Access to high power STAB moves such as Close Combat for bulkier foes
• Wide movepool
• Potential to run a surprise Special set

Cons

• Somewhat predictable, Tera-type is essentially revealed
• Low defenses
• Speed is not very good when not using Extreme Speed, leaving it prone to being revenge killed by Normal resists and First Impression from Haxorus

Potential Sets

Extreme Killer
Lucario @ Life Orb
Ability: Inner Focus
Tera Type: Normal
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant/Jolly Nature
- Swords Dance
- Close Combat
- Extreme Speed
- Meteor Mash

 

[STEELDRAGON]

Woah Lucario is one of the most dangerous pokemon in the tier. It is one of the few pokemon that can sweep from both the physical and special side. Once it's set up it can be extremely difficult to stop, as its largely resistant to other priority and even has Bullet Punch for Gengar. It can also run a Tera Normal Choice Band set which can easily clean up the opponents team late game. Really love using it.

 

[Zemyla]

It's important to note that a Tera Fighting Mach Punch or Vacuum Wave or a Tera Steel Bullet Punch get their power boosted to 60, so the double STAB means they have the same power as a Tera Normal Extremespeed, whose primary advantage is the extra priority.

You should also mention Shadow Ball as a notable move, as it has nearly unresisted coverage with fighting moves, only blocked by Hisuian Zoroark.

Note that, if you run Tera Fighting Vacuum Wave and Nasty Plot, an uninvested Timid or Modest Close Combat will still OHKO Blissey, even if it's Bold and 252 Def.

 

[STEELDRAGON]

It's important to note that a Tera Fighting Mach Punch or Vacuum Wave or a Tera Steel Bullet Punch get their power boosted to 60, so the double STAB means they have the same power as a Tera Normal Extremespeed, whose primary advantage is the extra priority.

You should also mention Shadow Ball as a notable move, as it has nearly unresisted coverage with fighting moves, only blocked by Hisuian Zoroark.

Note that, if you run Tera Fighting Vacuum Wave and Nasty Plot, an uninvested Timid or Modest Close Combat will still OHKO Blissey, even if it's Bold and 252 Def.

Unfortunately it doesn't get Mach Punch. Shadow Ball in particular helps break through Amarouge and Slowking. Hisuian Zoroark hasn't been released in generation 9 yet.