Simplify the following text for a Grade 6 native English-speaking person.
Original: The games released in North America are : Digimon World , Digimon World 2 , Digimon World 3 , Digimon World 4 , Digimon Digital Card Battle , Digimon Rumble Arena , Digimon Rumble Arena 2 , Digimon Battle Spirit , Digimon Battle Spirit 2 , Digimon Racing , Digimon World DS , Digimon World Data Squad , Digimon World Dawn and Dusk and Digimon World Championship .
Simplified: Digimon was created by the Bandai company . The Digimon are often used for evil by the main villain , depending on what season of Digimon .