I used https://epicedit.stifu.fr/ to make the tracks, palettes and to extract game data, https://www.smwcentral.net/?p=section&a=details&id=27208 (YY CHR) to make some of the compressed sprites and https://www.romhacking.net/utilities/108/ (Tile Layer pro) for the racer sprites. For hacking and hex editing, I used https://www.smwcentral.net/?p=viewthread&t=93458 to hack CPU orderings and https://epicedit.stifu.fr/smk_doc/
to edit compressed sprites (this is done easier with an unheadered ROM or a ROM that is 512 kb, or if you made some tracks, 768 kb).
