I have a great tip for starting a new pokemon game. You have to have another pokemon cartidge that you beat already. On the new version you have to get a corny pokemon and get it to where you can start trading. Then on your already
won version you have to fly to viridian, talk to the guy, say no. They fly to cinnibar and surf up and down the side. When a lvl 150 snorlax appears capture it and use rare candies until it resets to 0 agian. Then get it to lvl 15. Teach it good moves. And keep Hyper beam. (I taught mine surf, fireblast, solarbeam, and hyperbeam) then trade it to the new cartridge
and it will rock! You can beat all the gyms easy!!! It is a great combination with a mr.mime
Clone Pokémon (US) You need a friend for this. Trade the Pokémon to be cloned and have you friend get a Pokémon they don't care about. Trade them, and make sure the person getting the weak and common Pokémon can see the other's screen. When the receiver of the good Pokemon's screen says "waiting", turn off the Game Boy that's getting the bad Pokémon. When the other one says trade completed, turn that one off too. When you turn the games back on, you should both have the powerful Pokémon, but the weak Pokémon will be lost. Warning! This could delete a saved game or your Pokémon!
Fight 100+ Level Pokemon
I was reluctant to post this code because of the effect it would have on two player battles, that is it was almost like cheating.
Okay, here goes. Perform the 99 Items code above, then after encountering 'M, keep surfing around for a while and you will run into Pokemon that are Lv 135 and above! It is possible to capture them. What's so valuable about this trick is that you might just run into Bulbasaurs, Charmaders and Squirtles! However, some copies of the game can do this better than others, and if you
use the Pokemon in a battle other than a 2 player battle, it will revert back to a Lv. 100 Pokemon. Still, defeating these high level Pokemon is a quick way to earn up to 3000 Exp. Points
Find Missingno.
Use FLY and go to Viridian City. Talk to the old man almost all the way north of the town. When he asks if you are in a hurry, say no and watch him catch a weedle. Right after that, fly to Fuchsia city. Make your way south and, when you you reach the water's edge, use SURF and make your way to Seafoam island. When you get to seafoam island, swim up and down the beach until you run into a Pokemon called "M" (a glitch like Missingno.)He has three attacks: two waterguns and skyattack. He has a very low defense even at level 80 NOTE: catching him may cause minor glitches