To obtain a Growlithe in Pokémon games, you typically need to explore areas where it spawns, which often include grassy routes or specific locations like the Fire-type gyms or regions. In some games, you can also find Growlithe in the wild or receive it as a gift from NPCs. If you're playing Pokémon Go, you can catch Growlithe in certain locations or during specific events. Be sure to check the local Pokédex or guides for the specific game you're playing for more details.