Polywag evolved into Poliwhirl at level 25, an then into Poliwrath with a Water Stone.
In the game Pokémon Crystal the Pokémon Pidgeotto evolves from Pidgey at level 16. From Pidgeotto it then makes its third and final evolution into Pidgeot at level 36.
Buizel evolve at level 26.
Arbok does not evolve
Rare candies only raise a pokemon's level. There are no pokemon that need a rare candy to evolve. That being said, using a rare candy may elevate a pokemon to the level required for evolution.
They all evolve at different levels
poliwag evolves at level 25
it evolves at level 25
Level 25
In pokemon crystal Pigeotto evolve in 36lvl
Mareep will evolve at Level 15 in Pokémon Crystal.
Slowpoke will evolve at Level 37.
level 30
The Level When You Get A Life.
Level 30.
41
30
Level 36.