Reserving Lucario
Lucario @ Life Orb
Ability: Justified
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Close Combat
- Extreme Speed
- Bullet Punch
Take a look at Celebi. As far as offensive teambuilding goes, what are its most glaring flaws? For one, it's bait for some of the most common anti-offense 'mons in the meta, such as Mega Aero, Scarfers with U-Turn, Mega Absol, etc. Lucario alleviates this issue by acting as an offensive check to these threats, as well as posing a massive threat to offensive teams itself. Most crucially, it discourages Scarf Hydreigon from spamming its STAB's, which is an enormous boon for offense.
Furthermore, on the offensive side of things, Celebi and Lucario decimate each other's defensive checks. Celebi blows away the likes of Suicune, Slowking, and to a lesser extent Cobalion and Doublade, while in return Lucario takes on Blissey, Snorlax, Umbreon, and pretty much everything that doesn't want to take a boosted E-Speed.
Below is an admittedly flawed offence team I made to prove my point, wherein I attempted to capitalize on the defensive utility of Cele-Luc, while also supporting 'mons that appreciate the threats that they take on out of the way (Sharpedo lookin' mighty fine once that Suicune / Florges / Aggron core is gone). Bar a handful of threats, such as Sharpedo, Sableye, and Gyarados, the team is able to hold its own pretty well, and this is in large part due to Cele-Luc's ability to cover such a wide array of the tier's defensive threats.
Celebi @ Leftovers
Ability: Natural Cure
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Giga Drain
- Nasty Plot
- Earth Power
- Psychic
Lucario @ Life Orb
Ability: Justified
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Close Combat
- Extreme Speed
- Bullet Punch
Sharpedo-Mega @ Sharpedonite
Ability: Speed Boost
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Waterfall
- Crunch
- Protect
- Ice Fang
Mamoswine @ Life Orb
Ability: Thick Fat
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Stealth Rock
- Ice Shard
- Earthquake
- Knock Off
Salamence @ Life Orb
Ability: Intimidate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Draco Meteor
- Defog
- Fire Blast
- Roost
Azelf @ Life Orb
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Psyshock
- Nasty Plot
- Thunderbolt
- Fire Blast