you evolve snivy by leveling it up to level 17.
snivy is not going to evolve
Ash's Snivy didn't evolve yet.
snivy will evolve in this episode titled "full battle serperior vs snivy part 1
Snivy evolves at level 16
Snivy evolves into serperior
if snivy doesnt evolve at lv 17 you probobly pressed the b button
17 and 36! ;D
Level 17
Probably.
it has not yet been confirmed
At level 17, Snivy evolves into Servine.
Snivy evolves at level 17, however you must complete the game first if the Snivy is you or your partner.