Emerald
Pokemon Emerald is like a mix between Pokemon ruby and sapphire, but there are a lot of new stuff in this game. For example, you can get Groudon, Kyogre, and Rayquaza you may also choose if you want Latios or Latias but you can only choose one, and both team Aqua and Team Magma have a part in this game. There are even some new areas like the battle frontier. Another cool thing is you can battle the gym leaders more then once! Now that's pretty cool. Pokemon Emerald is for GBA(Game Boy Advance).