Pokemon Generation IV Sinnoh

Sinnoh is the fourth region in the anime and the fourth games. there are 8 gym leaders and 4 elite 4 leaders you can get there by boat there are 210 Pokémon in the IV generation or Sinnoh There are lots of caves and you need a special TM (thenical move) that lights up the cave that you are in there are also alot of caves you can find Pokemon that you can only find in caves.