Secret Coins In the game corner you can get lots of free coins (the game corner is in Celadon City) Anyway, talk to three people to get coins, and then walk around pressing A! I think you get 100 coins by pressing A!

ANY BALL A MASTER BALL: Um, I know for a fact this code DOES NOT work! Try this on a Mewtwo! With a pokeball... With a greatball..... with an ultra ball.... with a master ball (aha! This works!)

99 OF ANY ITEM Go to Viridian City, and at the top is a man who will say "Ah yes you can go past now, I've had my coffee now!" (or something like that) anyway, afterwards answer no to "are you in a hurry?" then he will show you how to catch a weedle! Then fly to Cinnabar Island! Surf around the right side of the island half on water/half on land. Then you will come accross a Missingno, or a M! Fight it, or run away (NOTE you may also run into Tangela, and Electrode)