The boat from 3-3 & 3-4 (and maybe some other levels) from Yoshi's Island DS. This thing is annoying as hell to use, and can also have some wonky slopes. Use the Underground set for the steep slopes & upside-down slopes. Map16 was arranged for easier building rather than efficiency.
Uses two Map16 pages and 5 ExGFX files. Good luck.
both map16 files are missing! reupload with those and it should be good to go