The Raichus and Pikachus are from Nintendo's Pokemon and this screenshot's taken from Valve's Garry's Mod. It is a gift for Blairscartoons.

Then this female Raichu found a Thunder Stone as a Pikachu, she uses it and evolved. However, her electrical power is much stronger than others that it causes her belly to accidentally bloat up, not that she mind, anyway. She seems quite playful and enjoys her new big fat fun. Her friends, including her fellow male Raichu, are quite happy, anyway, to see her evolve and more stronger. Good luck looking for more Thunder Stones, guys.