Simplify the following text for a Grade 6 native English-speaking person.
Original: PokÃ mon Gyms are buildings where the player faces a Gym Leader , who focuses one of the 17 types of PokÃ mon. .
Simplified: Among the facilities found throughout the PokÃ mon world are PokÃ mon Centers , PokÃ Marts , and Gyms . PokÃ mon Centers will heal a player 's PokÃ mon for free , and house PCs where players can organize their collection of PokÃ mon. .