Kanto
Charmander evolves into Charmeleon at Level 16, and Charmeleon evolves into Charizard at Level 36.
Squirtle evolves into Wartortle at Level 16, and Wartortle evolves into Blastoise at Level 36.
Bulbasaur evolves into Ivysaur at Level 16, and Ivysaur evolves into Venusaur at Level 32.
Johto
Chikorita evolves into Bayleef at Level 16, and Bayleef evolves into Meganium at Level 32.
Totodile evolves into Croconaw at Level 18, and Croconaw evolves into Feraligator at Level 30.
Cyndaquil evolves into Quilava at Level 14, and Quilava evolves into Typhlosion at Level 36.
Hoenn
Torchic evolves into Combusken at Level 16, and Combusken evolves into Blaziken at Level 36.
Treecko evolves into Grovyle at Level 16, and Grovyle evolves into Sceptile at Level 36.
Mudkip evolves into Marshtomp at Level 16, and Marshtomp evolves into Swampert at Level 36.
Sinnoh
Chimchar evolves into Monferno at Level 14, and Monferno evolves into Infernape at Level 36.
Piplup evolves into Prinplup at Level 16, and Prinplup evolves into Empoleon at Level 36.
Turtwig evolves into Grotle at Level 18, and Grotle evolves into Torterra at Level 32.
Unova
Tepig evolves into Pignite at Level 17, and Pignite evolves into Emboar at Level 36.
Snivy evolves into Servine at Level 17, and Servine evolves into Serperior at Level 36.
Oshawott evolves into Dewott at Level 17, and Dewott evolves into Samurott at Level 36.
Kalos
Fennekin evolves into Braixen at Level 16, and Braixen evolves into Delphox at Level 36.
Froakie evolves into Frogadier at Level 16, and Frogadier evolves into Greninja at Level 36.
Chespin evolves into Quilladin at Level 16, and Quilladin evolves into Chesnaught at Level 36.
Alola
Popplio evolves into Brionne at Level 17, and Brionne evolves into Primarina at Level 34.
Rowlet evolves into Dartrix at Level 17, and Dartrix evolves into Decidueye at Level 34.
Litten evolves into Torracat at Level 17, and Torracat evolves into Incineroar at Level 34.