1. Gastly - Haunter - Gengar

Pokemon Evolution GIFs

via Alex Draws 

 

2. Pikachu - Raichu

Pokemon Evolution GIFs

via Padnote 

 

3. Goomy - Sliggoo - Goodra

Pokemon Evolution GIFs

 

via The Coughing Dog

 

4. Charmander - Charmeleon - Charizard

Pokemon Evolution GIFs

via Brakken

 

5. Solosis - Duosion - Reuniclus

Pokemon Evolution GIFs

 

via The Coughing Dog