First,it should be mentioned that there are some things that have changed, and that some things have not changed.the things that have stayed include:
- 8 Kanto Gyms
- 3 starter Pokemon(Charmander,Squirtle,Bulbasaur)
- Elite Four(Lorelei,Bruno,Agatha,Lance)
- Johto Victory Road
- RS TM/HMs
- Tag Team Battles
And then,there are some things that have changed,or have been added.they are:
- Sevii/Rainbow Islands
- Johto Pokemon
- NationalDex
- Trainer Tower
- Deoxys
- Wireless Communications
- VS Seeker
- Fame Checker
- Union Room
- Compatability with Ruby and Sapphire and Colosseum
What's more,you ask?Just play the game to find out!