Fixes the following bugs:
- Restores the Museum Guy's functionality that was removed when trying to allow Brock skip. Now works fine.
- Attempt to fix Yujirou's Sabrina-like glitch. If this doesn't fix it, look at Sabrina between RB and Y
- Attempt to fix some Misty text.
- Changed Squirtle check to use EVENT_BEAT_SURGE over the ThunderBadge. Same effect, saves a line of code, generally easier.
- Reverts a really old and shoddy DV generation system back to vanilla.
Also, I changed some gym/rival teams to reflect new philosophies from Discord discussion.