Goldy

This Charizard nicknamed Goldy is a /-type Pokémon owned by Fer. He was the seventh Pokémon Fer caught, altought he was later released.

Kanto
Charizard was first introduced as a young Charmanderblocking Fer's access to Vermilion City and attacking her.

Fer tried to capture the entire gang, but only managed to capture this Charmander, Fer noticed this Charmander was yellow rather than orange and nicknamed him "Goldy". As a Charmander was loyal and became one of Fer's Pokémon, knowing that Fer was dedicated, selfless, and an all-around better trainer. It shows the same loyalty and respect towards Fer that he once had for its gang. It was happy.

After evolving into Charmeleon, its happy personality and loyalty disappeared, the reason being that Goldy's Charmeleon own skill level excelled that of Fer's and as such, it didn't respect her for no apparent reason, becoming slightly arrogant and overconfident.

Its personality did not change much, when it evolved into a Charizard, however, it rarely obeyed Fer's orders, and occasionally uses its Flamethrower on her to stop Fer from recalling it or sometimes when its trainer irritates it, it would embarrass Fer.

Fer didn't want to leave Goldy, but since it didn't obey any of Fer's commands, she realized Goldy wanted to be free and went through with it.

Trivia

 * Goldy is the first nicknamed Pokémon Fer caught
 * Goldy is also Fer's first shiny
 * Before being released Goldy as Charizard knew more moves than any other of Fer's Pokémon, at nineteen.