Simplify the following text for a Grade 6 native English-speaking person.
Original: PokÃ mon Gyms are buildings situated throughout the PokÃ mon world , where PokÃ mon Trainers can train or compete to qualify for PokÃ mon League competitions .
Simplified: The PokÃ dex is a tool used by PokÃ mon trainers all around the PokÃ mon world in different regions .