So..., here is my port of the Giant Koopa Shell Cave model from NSMBW. Why a port, you may ask? This is because the Giant Koopa Shell Cave actor (alongside with a few others leftover from NSMBW) has the code leftover for it, it just crashes due to the models missing. It's not a perfect port, but its decent enough I'd say. I also included the invisible slopes tileset I used for the shell collision that I had to make myself since NSMBU doesnt have one. Put big_shell.szs in content/Common/actor of your NSMBU rom. Then, import the tileset file into the 4th tileset slot with the Miyamoto Level Editor. Download: https://drive.google.com/file/d/1zwZy... Please read the README.txt file.