This is a team to defeat Genga, Gym Leader number one in the Pokemon League. He will exclusively battle NU, so here we go!

Lairon @ Eviolite
Trait: Rock Head
EVs: 252 HP/ 252 Def/ 4 SpD
Impish Nature (+Def,-SAtk)
- Stealth Rock
- Head Smash
- Earthquake
- Roar
Eviolite with Lairon completely skyrockets his Defenses like a boss. Impish Nature for more Defense and EVs in Defense for even more of this stat. Stealth Rock is important in a team, with Lairon that can set it up with his high Defenses. Head Smash is awesome on Lairon since it is a recoil-free move and powered up with STAB. Earthquake is in my opinion, a must-have on Lairon for coverage on Fire and Rock types. Roar is to do more damage with Stealth Rock.

Torterra (M) @ Leftovers
Trait: Overgrow
EVs: 4 HP/ 252 Atk/ 252 SpD
Adamant Nature (+Atk,-SAtk)
- Rock Polish
- Earthquake
- Stone Edge
- Wood Hammer
No time to chat, i'll go directly on the moves now. Rock Polish is for boosting by much Torterra's Speed. Earthquake is STAB and hits pretty hard. Stone Edge is for coverage and to destroy Flying, Ice and Bug types. Wood Hammer is for STAB and covers Lairon's Water and Ground weaknesses. With this moveset, this Torterra has no weaknesses.

Gardevoir (F) @ Leftovers
Trait: Synchronize
EVs: 4 HP / 252 SAtk / 252 SpD
Timid Nature (+SpD,-Atk)
- Psychock
- Calm Mind
- Hypnosis
- Shadow Ball
This another improvement suggested by Kyron.

Lapras (M) @ Leftovers
Trait: Water Absorb
EVs: 252 HP/ 120 Def/ 136 SAtk
Modest Nature (+SAtk,-Atk)
- Surf
- Ice Beam
- Thunderbolt
- Heal Bell
Here's the first improvement to my team, suggested again by Kyron :D

Sawk @ Salac Berry
Trait: Sturdy
EVs: 252 Atk/ 252 SpD/ 4 HP
Adamant Nature (+Atk,-SAtk)
- Stone Edge
- Endure
- Work Up
- Reversal
Ok, i put on this Mutant Karate Kid a good combo times two! Sawk's role is a 1 HP Sweeper. With Sturdy, he can resist all attacks that could have KO'ed him. This will activate the Salac Berry, making you faster. After that, use Reversal. After that, use Endure, and then, Reversal and vice versa. It is recommended to use at least one Work Up before the combo to make a more powerful Reversal but it is optional. Stone Edge is for coverage against Flying and Bug types, who are resistant against Fighting attacks.

Altaria (M) @ Leftovers
Trait: Natural Cure
EVs: 40 HP / 200 Def / 212 SAtk / 52 SDef
Quiet Nature (+SAtk,-SpD)
- Dragon Pulse
- Air Slash
- Flamethrower
- Cotton Guard
This is an improvement to my team, suggested by Kyron.
I want to get Sawk out of my team. He is useless to my team. I want, if possible, a Fighting type. If it is not a Fighting type, i better be good!