- All of the Silph Gauntlet maps use the same palettes as the map's they're based on
- Viridian Forest uses Viridian's palette, it just makes sense
- Power Plant is now yellow, just 'cause.
- Game Corner payouts are much faster, and have been slightly rebalanced
- Replaces tiles east and west of Cerulean so you can roam back to Mt. Moon and over to Rock Tunnel with no issue.
- Adds the Faraway Island sign, with a - "JI" bit to represent Mr. Fuji. This was in the Japanese release, but never got translated internationally. "I depart" may need fine-tuning, as it implies he died; this was a mistranslation, obviously.
- Added a text bank for the Mew encounter to make Martha's job easier later.
Underwater Tunnel is a new area that links Route 25 to Route 10, basically just being a straight tunnel needing Surf to traverse.
Also given Seafoam Islands and Lorelei's room an unused palette that gives it a more icy feel
