Super Mario 64 DS "Underneath the castle" glitch (Using Action Replay)

Start as anyone and use the L+up "sprint" code and Moonjump code. Go to the waterfall and sprint up it. You should fall behind the original map and into a bottomless pit (or so it seems...). If you Moonjump behind or inside the Castle, you will fall into a large pool of water. You can swim in this for as long as you like, but if you swim outside of the castle or jump outside the castle's roof or walls, you will have to re-perform the glitch. Happy Glitching!