For some reason the Daycare and the Super Rod house use the exact same map interior pointers? This commit uncouples them so edits can be made to the Daycare while leaving that house unaltered.
(also have some small text fixes I made ages ago and never pushed lol)
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