Pokémon Academy Life is a non-profit, fan-made visual novel that takes you into an alternate Pokémon world that doesn't send 10-year-olds off to fend for themselves. Here, characters from the core series games are put together in a more realistic high school setting. Rather than the player character leave on a solo journey at a young age, he (in this case based on Red from Pokémon Red/Blue/Green/Yellow) attends school like any one of us and learn about the Pokémon world from there. Prior knowledge of the Pokémon franchise is very helpful, but not necessary.
In order for you to be able to install this game, you need to enable (allow) installation of applications from unknown sources (Unknown sources) in the phone settings. Usually this item is in the Security section