Super Mario 64 DS Tips

See Yoshi Punch
This is an awesome cheat. What you do is go to Whomp's Fortress as Yoshi. Pick up a hat (either Mario, Luigi, or Wario). Go over to the piranha plant next to the red brick containing a mega-mushroom. Punch open the brick, then get damaged by the piranha plant (you will turn back into Yoshi). Then have Yoshi pick up the mega-mushroom. He will be able to punch and kick just like the other characters.