Glitches

Go toCinnibar Island. Trade with someone in the Pokemon Lab. Then go to the West of the Island. Surf along the coast. Keep going until you fight. The screen will blacken for 5-10 sec. It is at L.80 The defense is very weak.

Safari Zone Pokemon on the coast of Seafoam:

To do this you must have surf and fly. First fly to Fuschia City. Then go into the Safari Zone go to the area you would like to catch Po kemon from, and walk around until your steps run out. When they call you on the P.A. get out of the Safari Zone and surf directly from the bottom side of Fuschia (the part with the water) to the Coast of Seafoam. Now do not get on the land (if you do get o n the land by accident just get back on your surfing Pokemon). Just surf up and down the part where you are on half land and half water. It may take up to a minute but you should start to encounter Safari Zone Pokemon if you did the cheat right. The cheat is fairly easy to do.

Safari Pokemon on the Coast of Cinnabar Island:

Go to the guy that shows you how to catch a weedle in Viridian City. then when he is done showing you fly to cinnibar island and go to the right and swim up the coa st. you will see a missingno dont cathch him he screws up your game. keep going up and down some time soon you will see Safari zone pokemon. it works because i have tried it myself.

99 items:

Go to viridian city and go talk to the guy that had his coffee.You say that you are not in a hurry. After he teachs you that stuff go put the item you want duplicated at #6 go fight MISSINGO. and kill'm check your items and you should have 99 of that item.

Cloning Pokémon:

Note: This trick requires a nother Game Boy, link cable and Pokemon game.

Trade the Pokemon to be cloned, and have the other player select a Pokemon that he or she does not care about. Trade them, and make sure the player receiving the bad Pokemon can see the other player's screen. When the Game Boy that receives the good Pokemon's displays "Waiting", get ready to shut the other Game Boy off. When the "Waiting" message disappears, turn off the Game Boy that is receiving the bad Pokemon. When the "Trade completed" message appears, turn off the remaining Game Boy. Both games will have the same good Pokemon when they are turned back on.

Note: Do not attempt this trick with any saved games you wish to keep, as it can corrupt those files.