A SphereRMP file, as created by its File→Import→Image to Map feature, also has an RTS tileset embedded in it. Tilemap Studio could support loading these similarly to .2bpp.lz etc graphics.
Also NDS Gen 4+5's NCGR/RGCN graphics since Gen 1+2+3's 1/2/4/8BPP is already supported.
A Sphere RMP file, as created by its File→Import→Image to Map feature, also has an RTS tileset embedded in it. Tilemap Studio could support loading these similarly to .2bpp.lz etc graphics.
Also NDS Gen 4+5's NCGR/RGCN graphics since Gen 1+2+3's 1/2/4/8BPP is already supported.