>>15729418Contests (Gen III style)
Pokegear (It had a radio, a map of Johto + Kanto and the ability to allow you to rebattle trainers)
Pictures (with your Pokemon like in HG/SS)
Pokemon walking with you (like in Gen IV)
PWT/Battle Frontier
Join Avenue
Seasonal changes (I know they were purely cosmetic in B/W but it made the Pokemon world feel more "real")