Get to Cinnabar Faster:
Get HM Fly and HM Surf. Teach them to two different Pokemon. Instead of going through
Seafoam Island, fly to Pallet Town. Go south and start swimming. Soon you will reach
Cinnabar Island!
Submitted by: Tom Potter

The Easy Way to Beat Misty:
In Virdian Forest, capture a Pikachu. Before you battle Misty, go up the bridge and fight
all the trainers, then head back to the gym. Now it's much easier to beat Misty!
Submitted by: Friesian76
Expanded by: Orlandu250

Infinite Of Any Item:
Get HM Fly and Surf and teach it to two Pokemon. Then fly to Viridian City and talk to the
guy who teaches you how to catch Pokemon. Let him show you and then fly to Cinnabar. Set
the item you want maxed to the sixth space in your item list. Go to the east shore and
swim on it. When you find Missingno., defeat him. Now you have 99 of your item.
Submitted by: Craig Brunies, Philip Price

One Easy Kangaskhan:
Capture a Missingno., but give it a rare candy.
Submitted by: Craig Brunies

Catch Safari Pokemon Faster:
Talk to the man at Viridian City. Then fly to the Safari Zone. Enter and wait in the area
where your Pokemon is. After time runs out, swim to Seafoam island without battling
trainers, and swim up and down on the shore.
Submitted by: JZ935

Catch Pokemon Faster:
Hold B, or up and A, as your Pokeball opens for a better catch rate!
Submitted by: Stuart Bridson

Stronger Attacks:
Hold A while attacking.
Submitted by: Stuart Bridson

Get Mimic:
Give the girl in Saffron City with all the Pokedolls, a Pokedoll. She'll give you TM Mimic.
Submitted by: Barry Goodman

Ghost Computer:
Go to Celadon City hotel. Go where the computer normally is in any PokeCenter.
Now press 'A'!
Submitted by: Robert Pike

Pokemon that need to be traded to evolve:
Kadabra - Alakazam
Machoke - Machamp
Haunter - Gengar
Graveler - Golem

Pokemon that need stones to evolve:
Nidorina - Nidogueen (moon stone)
Nidorino - Nidoking (moon stone)
Clefairy - Clefable (moon stone)
Jigglypuff - Wigglytuff (moon stone)
Vulpix - Ninetales (fire stone)
Gloom - Vileplume (leaf stone)
Growlithe - Arcanine (fire stone)
Poliwhirl - Poliwarth (water stone)
Weepinbell - Victreebel (leaf stone)
Shellder - Cloyster (water stone)
Exeggcute - Exeggutor (leaf stone)
Staryu - Starmie (water stone)
Eevee - Vaporeon (water stone)
Eevee - Jolteon (thunder stone)
Eevee - Flareon (fire stone)
Submitted by: Vincent 3:16

Glitch City:

1. Go to the Safari Zone
   
2. Go to the REST HOUSE in front of you
   
3. Talk to the man in glasses
   
4. Try to EXIT the Safari Zone
   
5. When the man askes if you're leaving say NO
   
6. Repeat steps 4 and 5, then save the game
   
7. Turn the game OFF then back ON
   
8. Try to EXIT again the man should ask if you want to join the hunt say NO
   
9. FLY to Cinibar Island SURF around in the water until the P.A. gos off
   
10. You should now be in the Safari Zone entrace EXIT the building and you should be in GLITCH CITY!