What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Seeker, Emerald, Fire Red and Green Leaf

Pokemon games are in fact, the title of a game series, presented by Nintendo. There are many series of games published under the title of Pokemon and Seeker, Emerald, Fire Red and Green Leaf are the versions of this gaming series. Children love to play these games due to their advanced level thrill and mind-blowing charm.