Pokémon Go has become a runaway hit and many developers are showing their enthusiasm for the game by reverse engineering the private, internal Pokémon Go API and creating unofficial third-party apps. The current situation of the Pokémon Go API exemplifies mobile API security concerns.
There's no doubt that Wikipedia is a giant store of information. And yes, they have an API, but the data isn't exactly structured. But that didn't stop Jim Blackler, who created Quizipedia, a fun game based off of Wikipedia entries.