Nightvision in Pokemon
On GameBoy color when the word GameBoy appears on Pokemon hold B+>.

Safarizone Pokemon on Cinabar
Go to the Safarizone and bike around until the P. A. says times up. Then fly to Cinabar Island and Surf up and down the side. You will run into Safarizone Pokemon.

Very easy way to get Kangeshkahn
The first thing you must do is make sure you have a rare candy. Then clear a space in your line up. Then you have to go to Viridian, talk to the gatekeeper, listen to his little speech about catching pokemon. Then FLY to Cinnabar island and surf up and down the east coast of it. You will eventually encounter either a Missingno (Missing Number) or a pokemon that has static around the letter 'M' as it's name. If you encounter Missingno, it is very strong (L 132) if you can take it on great, it gives plenty of expierience points. When you encounter M catch it. It should be at level 0 and is very hard to catch. I suggest using duplicated master balls. When you catch the M and feed it a rare candy, it WILL evolve int a Kangeshkahn. Something that is really cool is that you can teach Fly and surf to M, evolve it then teach it cut and strength as a Kangeshkahn. It's funny to watch Kangeshkahn fly. Imagine what it will look like on Pokemon Stadium !

Duplicate Items
Place the item you want to duplicate in the sixth item slot. Now you are ready to do the code. First, go to Viridian City. Talk to the man who teaches you to catch a Weedle. When he asks you have you are in a hurry, say no. When he is done, fly to Cinnabar Island and use surf to swim snugly on the east coast. Swim up and down as many times you want. Soon, you will have duplicated the item. WARNING: If you run into a Missingno, CATCH AT YOUR OWN RISK! If you do catch it, it may mess up your game

Free Slot Coins
Walk around in the slot place and keep pressing A. After a while you will find 10,20,or even 100 coins. You can also get coins by talking to people at the slots.

Start with 1, 2, or three pokemon
As a name at the begining enter one of the three super birds.
Start w/1 pokemon: Articuno
2 pokemon: Zapdos
3 pokemon: Moltres

Will work 1 out of 20 times, won't hurt if don't work just try again.

Cool coincidence? or something else?
If you didn't realize this already, Articuno, Zapdos, and Moltres have spanish numbers in them. The number 1 is in Articuno, which has UNO. Zapdos has #2, which is DOS. Moltres has #3, which is TRES. Pretty cool huh?

Hint
If you want to get the evolved forms of Nidorina, Nidorino, and Clefairy do not use a Moon Stone on Jigglypuff. You can find Wigglytuff in the Unknown Dungeon.

150 Masterballs
( You need a masterball for this trick ) Put your masterball in sixth place on your item list. Talk to the guy that teaches you how to catch pokemon in viridian city. Fly to cinnabar island and swim on the coast by the gym. When you find missingno , beat him. When you get out of the battle check your item list it should have a zero with a little picture by it. ( This trick works with any item )

Get Mew, the best pokemon of all!
To get Mew, you must NOT YET HAVE CUT(or still be on the ship with it). Right after you get cut(HM01), go to any trainer on the ship and let him beat you. DO NOT WALK OFF THE SHIP! By letting the trainer win, you get off the ship without it leaving.
After you get surf, go back to the harbor but don't get on the ship. When you are right infront of the S.S. Anne, use surf to get behind the ship and push it out of the way. Where the ship was, Mew should be there. !NOTE!=Mew can learn ANYTHING! Also, he is the strongest Pokemon in the game, and can scare away wild pokemon! He is No.151.

Unlimited Rare Candies
Go to the Poke Center on Cinnibar Island. Have one rare candy in the sixth slot on your items list. Then go up and down the east coast till you find a Missingno. not the other one. Run from the Missingno and check your items list. The rare candies will have a symbol in the left number.(You don't go to the man in Virdian city for this cheat)

Always encounter "missingno"
While you are surfing back and forth along the right
side of Cinnibar Island. When you encounter a pokemon right when the screen turns all black Hold UP + A and keep holding it if it worked the screen will stay black for a while then it will go to a missingno , if done incorrectly because of bad timing you might encount pokemon over level 100.

150 rare candys
(you will need at least 1 rare candy)place your rare candy in 6th position.Fly to cinnabar island and fight missingno,beat him. NOTE:if the rare candy isnt in 6th position it wont work.

Mimic TM
Buy a Pokedoll at the Celadon City mall. Go to the Copy Cat's house in Saffron City. Talk to Copy Cat and there will be this cool sequence where Ash talks to Copy Cat (I think it's cool because you never hear Ash talk in the whole game except for now)! Then she will give you the Mimic TM for your Pokedoll.

Get A Free Rare Candy
First, go to Ceruleun City and go into the man that tells you about the badges back yard. Go into the backyard and keep pressing A and move around. Soon, it will say "Ash Found a Rare Candy."

Safari Zone
Enter the safari zone and go to the plot of grass that the pokemon you want is in run out of time and surf to the edge of sea foam islands there you will find the pokemon you want wait for a rare pokemon because they hardly come but be patiant and you will have the pokemon tou want.

Cheat
First trade with one of the people on Cinibar island then surf up and down the East coast wiht it until you come accross a Missingno. pokemon catch it and put it on top of the you're list of Pokemon then fly up to Viridian city and look at Missingno's stats then talk with the Old Man who shows you how to catch pokemon then fly back down toCinibar island and surf up and down the coast again and you should come across things like level 175 Charmeleons and level 160 Missingno's and sometimes level 0 ++m++ "Mysterio" but don't let any level 0 Pokemon in you're PC until it's level 1 at least