It evolves with a thunderstone not levels
level 50
Tynamo evolves into Eelektrik starting at level 39. Eelektrik evolves into Eelektross by using a Thunderstone.
Eelektrik evolves into Eelektross when you use a Thunderstone on it.
Tynamo evolves at level 39 into Eelektrik.
Tynamo evolves into Eelektrik at Level 39.
You can evolve Eelektrik by using a thunderstone.
Eelektrik evolves by using a Thunderstone on it. It learns its last move (Thrash) at Level 74, so if you want it to know Thrash, evolve it when it reaches level 74.
Tynamo evolves into Eelektrik at level 39. Then with a Thunderstone it will evolve into Eelektross. It stays an electric-type and still has Levitate as its ability, leaving it with no super-effective attacks against it
Evolve it using an Thunder Stone.
You'll need a Thunder Stone to make it evolve.
Eelektrik, Pikachu and Eevee are the Pokémon that can evolve once you use a Thunder Stone on them.
The only new one to use thunder stone is Eelektrik to Eelektross. Then you have your Pikachu/Raichu and Eevee/Jolteon.