Time to share everything we have learned from the research.
Mystery Event Activation
RS: Section 2 - 0x03A9 - bit 6
RS: Section 2 - 0x05C0 - bit 2 (Flag for the NPC?)
E: Section 2 - 0x0405 - bit 6
Notes:
In Ruby & Sapphire Mystery Event can be activated by the NPC at the 1F of the Pokemon Centerin Petalburg City, right next to the PC.
The requirement for the activation is beating the Gym Leader Norman and getting the Balance Badge from the Petalburg Gym.
To activate it you hav