DO NOT I REPEAT DO NOT CATCH MISSINGNO, i was told it wil start deleting pokemon off of your game,DO NOT CATCH MISSINGNO!!
Cheat1--99 ITEMS--Talk to the guy that has had his coffee and shows you how to catch weedle,say you are not in a hurry,right after that,jump on a pokemon and FLY to cinnibar island....then,before you do anything,walk right and keep going till you reach the water edge...SWIM on a pokemon up and down the coast....fight missingno DO NOT CATCH HIM and whatever item is in the 6th place of your item list will get you 99 of that item...a good thing is to do this with a golden nugget and sell them for 999999 dollars or yen or whatever...
Cheat2--STAND ON A TREE--this isnt really a cheat but something cool.... a shrub or tree or whatever that blocks your path and CUT it down...stand in the spot where it was and save your game....turn the power off...then on and continue your game....YOU WILL BE STANDING ON THE TREE!!!!
Cheat3--FREE POTION WHEN YOU START--When you start a new game,in the room go to the computer and access the items,you will find a potion in there!!!!!!!!
Cheat4--SAFARI POKEMON IN THE WATER--go to the safari zone and then swim up and down the cinnibar coast....safari pokemon will be there...
Cheat5--GUY ON ROOF--go to cinnibar island and make sure you do not have the key that unlocks the building....SWIM down the coast and then back up....come up to right in front of the building and walk to the door....there will be a guy on the roof!!!