Turn All the Coins on SM64 Into Cheese Rounds:
Note: This trick won't work if you were born in the states of New Jersey, New Mexico, New Hampshire or New York.
Load your game cartridge as normal into the N64, and when Mario's face comes up, pull the nose straight up, the cap 20 degrees to the left, and the mustache down graphically by a slope of 2/5. After that, press START and select a NEW file. When the intro sequence starts, press the C up button right as the princess says the word "Toadstool".
Nothing unusual will happen yet, but don't let that discourage you, you are on the right track.
Next, play the game as you normally would, but each and every time you encounter a coin in the game, you must long jump into it (the underwater coins don't count, collect them normally. Same goes for the mid-air coins.)
Also, for each level's goombas, you must butt-smash them.
***Important*** This is the tricky part.
Each time you beat Bowser, before you get the Keys or Jumbo Star, run around him in circles with an approximate diameter of one twentieth of the length of Bowser's small intestine. The circles must take no more than 10 seconds each and no less than 9 seconds.
You will know if you have done the cheat right if, after defeating Bowser in the Sky and running around in that last circle, his stomach fluctuates and he turns into a giant waffle. The game ending sequence will then play.
After that, restart the game and select the file you just did the cheat on, touching the four ports on your N64 in the following order right before you start to play:
4 2 3 1
After that, start the game and go inside the castle. All coins in the game should now resemble small cheses and when you get 100 in a level, Mario will gain a new ability: Rocket Butt. To use this ability simply press the C< Button then do a Backflip, pressing L in the air to release a powerful flatulate that will send Mario soaring upward for about 30 seconds.
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"They shouldn't be called game cheats; it isn't cheating, it is finding what the programmers put in for the bored ppl to find."
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TAYL: Talk At Ya Later
Lazer Mario