Gen 3 is the best!!
You can travel on land, water or even dive in the water and find interesting places, it introduced double battles, something new like mirage island and battle frontier, emerald the first game to let you battle gym leaders again, it has awsome starters, nice characters. Introduced Pokémon Contest. It has a handsome champion (maybe XD). It even has two bike which includes the hopping bike. It has awesome legendaries (Rayquaza) one more importantly thing in gen 3 our characters have both mother and father last but not the least, ORAS Introduced a new and fun way to fly all over the region :)
(And honourable mention to the trick master)
