PureRGB [1] is a very comprehensive hack that fixes a bunch of bugs from the original game and adds a bunch of new content. All of the elementary school playground rumors are implemented as well like Bill's backyard, Mew being under the S.S. Anne truck, etc. I played through it last year until just before Victory Road before getting sidetracked by more important life events. I'll probably pick it back up sometime later in 2025.
[1] https://github.com/Vortyne/pureRGB