Please note that I'm going by PokemonDb tiers. Apparently in PO Lucario is OU.
Graddaddy (Xatu) (M) @ Focus Sash

Trait: Magic Bounce
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Psyshock
- Hidden Power [Flying]
- Shadow Ball
- Giga Drain
Comes in and blocks all those threats like Cradily, Aerodactlyl, Donphan and crew by bouncing off toxic and S-rock with magic bounce. Psyshock is to piss off Chansey, Giga Drain is recovery and getting on Donphan, HP flying is decent STAB, Shadow balls are coverage.
Your Mom (Cradily) (M) @ Leftovers

Trait: Suction Cups
EVs: 4 HP / 252 Def / 252 SDef
Bold Nature (+Def, -Atk)
- Stealth Rock
- Toxic
- Giga Drain
- Stockpile
This guy is awesome. He has great defenses can set up rocks and stall. Stockpile is to beef that defense up even more, Toxic is erm.., Giga Drain is a surefire way to finish them off and to recover. btw this guy is disturbing.
Epicness (Lucario) (M) @ Focus Sash

Trait: Steadfast
EVs: 4 HP / 252 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Vacuum Wave
- Nasty Plot
- Aura Sphere
- Dark Pulse
This is the classic Lucario. The movesets pretty self-explanitory.
zombie (Archeops) (M) @ Flight Gem

Trait: Defeatist
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Acrobatics
- Earthquake
- Stone Edge
- U-turn
My physical sweeper. Once again not much explanation is needed tackles a few pokes then defeatist kills him.
Magneton @ Eviolite

Trait: Analytic
EVs: 128 Def / 252 SAtk / 128 SDef
Calm Nature (+SDef, -Atk)
- Thunderbolt
- Flash Cannon
- Hidden Power [Ice]
- Magnet Rise
Eviolite Tank. T-bolt is STAB, Flash Cannon is the other STAB and for his horrible movepool, HP ice is coverage, and due to me not being able for air ballon Magnet rise.
FromAHole (Durant) (M) @ Wide Lens

Trait: Hustle
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature (+Spd, -SAtk)
- X-Scissor
- Stone Edge
- Dig
- Iron Head
Physical Sweeper. X-scissor is STAB and can OHKO an average Hydregeon, Iron head is also STAB, Stone edge and dig do the rest. Due to me hating truant I used hustle+wide lenses so I can keep my accuracy and get a boost.