Tools like NSC Builder can be used to merge these into a single file.
If your goal is to learn to create pixel art rather than just playing the "color-by-number" game, consider these tips: Pixel Paint (NSP)(eShop).rar
: Players fill in numbered pixels with corresponding colours to complete illustrations. Tools like NSC Builder can be used to
: Originally released on the 3DS eShop, it is now available for the Nintendo Switch. Handling the .rar and .nsp Files Pixel Paint (NSP)(eShop).rar