The first attempt
Roster
AbilityChlorophyll
NatureModest
EVs2 Def / 32 SpA / 32 Spe
Moves
Grassy TerrainLeech SeedSolar BeamSludge Bomb
AbilityFriend Guard
NatureHardy
EVs2 HP / 32 Def / 32 SpD
Moves
Sunny DayFollow MeProtectFake Tears
AbilityThick Fat
NatureAdamant
EVs32 HP / 32 Atk / 2 Def
Moves
RetaliateProtectSunny DayLast Resort
AbilityRock Head
NatureAdamant
EVs32 Atk / 1 Def / 1 SpD / 32 Spe
Moves
Flare BlitzRetaliateExtreme SpeedDouble Edge
AbilityNo Guard
NatureAdamant
EVs2 HP / 32 Atk / 32 Spe
Moves
RetaliateDynamic PunchIce PunchBullet Punch
AbilityIllusion
NatureAdamant
EVs32 Atk / 1 Def / 1 SpD / 32 Spe
Moves
Night SlashSucker PunchShadow ClawKnock Off
Strategy
Try to win
Lead Options
Venusaur + Maushold
Win Conditions
See the win screen
Threats & Bad Matchups
Probably all of them