Evolution. Snivy evolves into Servine at level 17.

How do you evolve a snivy?

Snivy evolves into Servine which costs 25 Candy, which then evolves into Serperior costing 100 Candy.

What LVL does Servine evolve?

Servine (Japanese: ジャノビー Janovy) is a Grass-type Pokémon introduced in Generation V. It evolves from Snivy starting at level 17 and evolves into Serperior starting at level 36.