Snivy @ Eviolite / Kebia Berry / Choice Scarf / Choice Specs
EVs: 236 SpA / 240 SpD / 16 Spe
IVs: 1 Atk / 30 Def / 30 SpD / 30 Spe
- Leaf Storm
- Hidden Power [Rock]
Leaf Storm works well with Contrary as it will raise it's Special Attack stat by 2, since Snivy is not a bulky Pokemon, it would need a healing move, Growth would not work since this Snivy has contrary, Hidden Power Rock because it counters all of Snivy's weaknesses except for Poison, Glare to lower down other Pokemon's speed, it also has a chance of not moving due to Paralysis.
Snivy @ Eviolite / Choice Band / Choice Scarf
EVs: 236 Atk / 236 SpD / 12 Spe
- Leaf Blade
- Swords Dance
- Knock Off
- Grassy Terrain
Leaf Blade because it has high critical hit ratio and Swords Dance raises it's Attack by 2 stages, while Knock Off deals double the Damage when the oppoment has a held item which it will also Knock Off, Grassy Terrain is for raising Snivy's attack that it does along with Swords Dance and Overgrow, Grassy Terrain also has a side effect of healing all Grass types by 1/16.
I've hoped I've helped!