What does the hipster do in Pokemon ruby?

There's no character specifically referred to as a "hipster" in Pokémon Ruby (or any other Pokémon game for that matter). The term "hipster" is a modern cultural reference that wouldn't be present in the context of a game like Pokémon Ruby, which was released in 2002.

It's possible you're thinking of a specific character with a style that could be interpreted as "hipster-esque," but without more information, it's hard to say for sure.

Could you please give me more details about who you're thinking of or what kind of character you're looking for? Maybe describe their appearance or personality, and I'll try to help you identify them.