>7 new forms
>expanded regionaldex
>Distortion World and other expansions to the story
>graphical updates to the whole region
>redone NPC teams that didn't take away Pokemon
>your own Villa that you could customize
>move tutors
>start of Wi-Fi events(inb4 a retard claims it was DP)
>multiplayer Battle Frontier
>Gym Leader and other various Trainer rematches including the first ever Gym Leader and E4 Double Battle
>added foreign Pokédex entries
>faster move animations and surfing
>WiFi Plaza which include 3 online multiplayer mini games
>animated back and trainer sprites
>introduced Looker
>added the Vs. Recorder
>some Gyms and Galactic hideouts were redone
>let you share contest pictures
>trading eggs
>literally emailed you if someone traded you on GTS
>tons of other small editions not worth mentioning
>not split into two versions
>includes a NationalDex

Really seems like all this faggots shitting on it never actually played this game or at least not when it was new. Face it this was a huge expansion and one of the most influential games in the series. Something USUM isn't and never will be.