Where do you get the good rod ash gray?

In Pokémon games, you can obtain the Good Rod in the Hoenn region from an NPC named a fisherman in the house near the entrance of Route 118. Specifically, in Pokémon Ash Gray, you typically receive it after progressing through the storyline and defeating certain trainers. Make sure to explore and talk to characters in the game, as they often provide useful items like the Good Rod.