Pokémon - Image #904,693

This has been a thing for quite a while, in the Emerald chapter Pokémon Special/Pokémon Adventures manga. Other jobs that she cosplayed as includes (note: the picture itself is from the manga, but the colors are fanmade for the first 2 pictures)

Nurse

Reporter

In the Author's Notes she also was a CheerLeader

and Idol

Also, in the ORAS chapter she also showed up as an Explorer