Don't know how u got to this but it's a bad custom game team a brief fix of someone else's not a good team really but u can use it

Gex (Sceptile-Mega) (F) @ Iron Ball
Ability: Contrary
Shiny: Yes
EVs: 252 SpA / 4 SpD
Quiet Nature
- Giga Drain
- Draco Meteor
- Leaf Storm
- V-create
- Bug Buzz
- Giga Drain
- Air Slash
- Shadow Ball
- Volt Tackle
- Dig
- Iron Tail
- Double Team
- Extreme Speed
- Drain Punch
- Dragon Pulse
- Aura Sphere
- Earthquake
- Sandstorm
- Dragon Claw
- Poison Jab
- Sunny Day
- Solar Beam
- Flamethrower
- Focus Blast

Groudon-Primal @ Iron Ball
Ability: Desolate Land
Level: 9999
EVs: 252 HP / 4 Def / 252 SpA
Relaxed Nature
IVs: 2 Spe
- Burn Up
- Gyro Ball
- Spectral Thief
- Imprison
- Dragon Tail
- Baton Pass
- Whirlwind
- Toxic
- Sleep Talk
- Heal Bell
- Recycle
- Aromatherapy
- Eruption
- Spore
- Sleep Talk
- Recover
- Forest's Curse
- Perish Song
- Rest
- Thousand Arrows
- Ingrain
- Earth Power
- Tail Glow
- Thunderbolt
- Cosmic Power
- Rapid Spin
- Knock Off
- Cosmic Power
- Clear Smog
- Haze
- Speed Swap
- Trick Room
- Substitute
- Fissure
- Horn Drill

Yanmega (F) @ Leftovers
Ability: Speed Boost
Level: 9999
EVs: 252 SpA / 4 SpD / 252 Spe
Modest Nature
IVs: 0 Atk
- Bug Buzz
- Giga Drain
- Air Slash
- Shadow Ball

Raichu (M) @ Leftovers
Ability: Static
Level: 9999
Shiny: Yes
EVs: 252 HP / 252 Atk / 4 Def
Adamant Nature
- Volt Tackle
- Dig
- Iron Tail
- Double Team

Lucario (F) @ Choice Band
Ability: Inner Focus
Level: 9999
EVs: 252 Atk / 252 SpA / 4 Spe
Mild Nature
- Extreme Speed
- Drain Punch
- Dragon Pulse
- Aura Sphere

Garchomp (M) @ Garchompite
Ability: Sand Veil
Level: 9999
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- Sandstorm
- Dragon Claw
- Poison Jab