Simplify the following text for a Grade 5 native English-speaking person.
Original: Each region has its own PokÃ dex , which differ in looks , species of PokÃ mon catalogued , and capabilities such as the ability to sort the list of PokÃ mon based on alphabetical order , or display the PokÃ mon 's height compared to the player character .
Simplified: The PokÃ dex makes records of information about each of the different PokÃ mon. . There are 649 different species of PokÃ mon recorded in the world today .