thunder stone
she can not
Shellos evolves into Gastrodon at level 30.
Koffing evolves into Weezing at level 35
croagunk evovles at level 38 or 37
you level it up during the day with max friendship
Pikachu does not evolve through level-up -- instead, you can use a Thunderstone for it to evolve.
Nidorino doesn't evolve by level it evolves by moon stone
charmander at l.16 and charmeleon at l.36
when you have completed his friendship to max level it up and you get a pikachu
it evolves into pikachu when it friendship level is high and you level it up
level 32
it will evovle at level forty-five