Simplify the following text for a Grade 3 native English-speaking person.
Original: Although other trainers ' PokÃ mon can not be captured , the player may use a PokÃ Ball on a wild PokÃ mon during battle .
Simplified: They 're the fourth main group of PokÃ mon games in the series . In the game , the number of PokÃ mon is brought up to 493 .