One of the Wookies, Chewbacca appears in episodes III, IV, V and VI. Kashyyyk is covered by a forest but has been designed so that it doesn't look to similar to Moon of Endor or Yavin IV. Kashyyyk features in Revenge of the Sith where Yoda visits to provde support against the Separatist droid army.
During the battle between the Republic's Stormtroopers and the Trade Federation droids, Chewbacca makes an appearance.
The short scene that was set on Kashyyyk was made in Guilin, China. The area is situated to the north west of Hong Kong.