>>31330090Oak asks you to accompany him to Goldenrod on the train to be interviewed on the radio.
While there, a breakaway branch of Rocket Thugs (new trainer class) attack the Department Store. You clean up the mess with the help of Whitney, who says to call to her gym later.
This sets you on a journey to collect the Gym badges. Rocket Thugs around the region are vandalising places and involved in petty crime (Kimono Theatre, Kurt's House, Elm's Lab, Moomoo Farm, etc).
Include a quest to retrieve Kurt's GS Ball, a final Thug Leader showdown, and a Celebi legendary encounter.
Finally, battle the E4 once again, the same four people, but the final battle is against someone new, not Blue, that you met in Johto.
Optionally, change some Johto Gym leaders - i.e. Bugsy and Falkner are different - as this is three years earlier than GSC.