Hint: Missingno Pokemon:
The U.S. version of the game contains the following glitch Pokemon,
which is obtained by using these steps. Go to Cinnabar Island. Enter into
the building where the man makes Pokemon out of fossils. Enter the first
room in the building with people that want to trade Pokemon. Trade with
one of these people; it does not matter which one. Go back outside and
move to the far right side of the building. Then, surf up and down the
side of the island while half on land and half in the water. Keep surfing
until challenged by a glitch that resembles a microchip or barcode. He is
part bird and part water type and starts on level 80. Note: Obtaining
Missingno can keep the game from continuing correctly, including
preventing linked battles, and other bad effects. It is recommended that
Missingno be released unless you are just experimenting with the game.
Information in this section was contributed by Roaddog Smith, Craig Wagner, Nitro, and Shorty.

Store the Missingno Pokemon in Bill's PC. It will eventually turn into a
Rhydon.
Information in this section was contributed by KeyMan3216.

Hint: Pokemon "M":
Note: This only works in the Blue version of the game. Go to Viridian
City and talk to the old man. When he asks if you are in a hurry, answer
"No". After he explains how to catch a Weedle, fly to Cinnabar Island.
Surf on the side of Cinnabar that faces the Seafoam Islands to find the
Pokemon "M". Note: Obtaining M can keep the game from continuing
correctly, including preventing linked battles, and other bad effects. It is
recommended that M be released unless you are just experimenting with
the game.
Information in this section was contributed by Phil Abbate, Cj0004, and storm 64.

Hint: Unlimited items:
Find the Missingno Pokemon and defeat him. A design will appear in your
sixth item. Deposit your sixth item individually until it totals 99. Then
you can divide the items by fifty. If a no more room message appears,
just withdraw an item and keep depositing the sixth item. Check the
CPU when this is complete to find two groups of 99 of the same item.
Information in this section was submitted by Gian-Paul Vidal and Shorty.

To get 99 of any item, first put the item to be multiplied in the sixth
slot. Now 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. After that, fly to Fuchsia city. Make your
way south and, when you reach the water's edge, use SURF and go to
Seafoam Island. After arriving, swim up and down the beach until you
run into a Pokemon called "M" (a glitch like Missingno). Once you see
him, kill him or run away -- do not catch him! After that, you should have
99 of your 6th item! Note: You can do this code as many times as you
want and you can catch "M" another time. Additionally, instead of "M" a
level 128 Starmie (Red Version) or Snorlax (Blue Version) may appear.
Information in this section was contributed by Spounge and Victor Twu.

For unlimited money, place a gold nugget in the sixth item slot and get
ninety-nine of them. Sell all except one to increase your money. Use the
remaining gold nugget to repeat this procedure.
Information in this section was contributed by Lee Speer.

Use the unlimited item trick with "Rare Candy". Once duplicated, use the
"Rare Candys" on all your Pokemon that are at very low levels to quickly
increase them. Note: The highest level possible is 100.
Information in this section was contributed by AndyJ.tOrReS and bjwe.

Hint: Old man on roof:
Step to the right of the door at the gym where you get the Volcano
Badge. You should be on the edge of the water. Use Lapras to surf out
into the water. Then, come back in and go to the door. The game will
say that the door is locked. Look on the roof to find an old man.
Information in this section was contributed by Stone Cold Clayton.

Hint: Easy experience:
An easy way to earn experience for a weaker Pokemon is to put your
lowest-level Pokemon at the top of your list. When a fight begins, it will
be the first Pokemon released. Instead of fighting, just switch to a
stronger Pokemon. The weaker Pokemon will share the experience from
the battle without being put in any danger. This is a good way to make
your Pokemon gain experience evenly.
Information in this section was contributed by Ed Griffiths.

Hint: Winning money in Celadon City:
Enter Celadon City and get the coin case from the man in the back of the
diner. Go to the slots and ask for some free coins. You will use these to
play the slots and win Pokemon prizes. Here is how to find the slot
machine that pays out the most. When you walk in, there are rows of
slots. Find the man to the far left that says "wins come and go". Below
him is a machine that is out of order. Play the machine directly beneath
it. Do not get frustrated if you do not win constantly. If it stops paying
out a lot, leave, go train your Pokemon, and come back later. Note: This
trick works more often in the "Blue" version of the game.

Also try walking around Celadon's Game Corner and repeatedly press A
to find coins that people have dropped
Information in this section was contributed by James Queen and Barrett Steinberg.

Hint: Teleport:
An Abra is hard to catch, but it is worth it. When your Pokemon are weak
and you need to get to a Pokécenter quickly, press Start and choose
Pokemon. A list of your Pokemon will appear. If you have Abra with you,
choose him and select teleport. Note: You have to be outside first; use
an escape rope if needed. It will take you directly to the last Pokemon
Center visited.
Information in this section was contributed by James Queen.

Hint: Clone Pokemon:
Note: This trick requires another Game Boy and Pokemon game. Trade
the Pokemon to be cloned, and have the other player get 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.
Information in this section was contributed by Spounge.

Hint: Other ways to get to a Pokécenter:
Besides teleporting, the following methods may also be used to get to a
Pokécenter. Use Dig when in a cave; Fly (HM05 that lets you fly to any
desired town; Also try Softboiled that you can only teach Chansey. It
takes some of Chansey's health to give to another Pokémon, and also
restores Chansey's health by half during a battle. Flash, used to light up
Rock Tunnel and make an opponent's accuracy fall. Cut used to cut
certain bushes and is used like Scratch in battle. Surf, which lets you
surf across any body of water and is used like the Hydro-Pump in battle.
Information in this section was contributed by Barrett Steinberg.

Hint: Keep earning money:
Here is a great way to keep getting money even after beating all the
trainers in the game. Keep betting the Pokemon league 4 and your rival
repeatedly. You can beat them an unlimited number of times. This is
also a useful to build levels quickly.
Information in this section was contributed by D Generate Three Sixteen.

Hint: Fight Safari Pokemon elsewhere:
This trick allows you to fight Pokemon from one area of the game in
another area. For example, go to the Safari zone and battle for a while.
Fight a Taures, then leave the Safari zone. Then, go to the island where
Articuno is found. Swim up and down the shore, at the point where it
appears that you are on the ground, but are actually swimming in the
water. Monsters from the Safari zone will appear here.
Information in this section was contributed by Matt Golden.

Hint: Unlimited chances to catch rare Pokemon:
First ,find a rare Pokemon such as a Mewtwo. Then, immediately before
entering a battle with it, save the game. Now you can battle the
Pokemon without worrying about not catching it. If you make a mistake
and make it faint, stop and shut off the game. Then, turn on the game
and use the continue option to restart just before the battle.
Information in this section was contributed by Matt Golden.

Hint: Unlimited time for Safari Zone (Water Pokemon only):
This trick allows an unlimited amount of time in the Safari zone to catch
Water Pokemon. Obtain a good or super rod. Next, go to the Safari zone
and find some water. Then, go into inventory and use the rod to start
fishing. If a "Not even a nibble" message appears, press A, then quickly
press Start. If you got into a fight, check the Pokemon out. If it is one
you do not have, catch it then quickly press Start after the battle.
Return to the inventory and fish again. If you already have this
Pokemon, run from it, then quickly press Start and begin fishing again.
This will help you catch some good Water Pokemon with plenty of time.
Information in this section was contributed by Matt Golden.

Hint: Quick Safari Zone captures:
Go to the Safari Zone and use up your time in the different areas. Once
the PA removes you from the hunt, fly to Cinnabar Island and surf half
on land and in the water on the side facing Seafoam Island. In a short
amount of time, you will be able to capture all of the Pokemon from
Safari Zone.
Information in this section was contributed by Articuno.

Hint: Fish forever:
In the Safari Zone, the 500 units that are allocated when entering are
based on number of steps, not time, spent. You can fish forever in the
park if you go to water and not move the entire time that you are
fishing.

Hint: Better chance to capture Pokemon:
When you throw a Poke-ball hold A as it closes on the Pokemon. The
Poke-ball will shut tighter, making it easier to catch the Pokemon.
Information in this section was contributed by Matt Golden.

When using any kind of Poke-ball (except the Master Ball), enter a battle
and prepare to throw it at a Pokemon. As soon as it appears, hold Up +
B. The Ball will become a Master Ball and catch the Pokemon. Note: This
trick requires precise timing.
Information in this section was contributed by James Queen.

Hint: Catch Pokemon at level 15:
Press Start, A, B (requires precise timing) to catch a Pokemon at level
15 with the Poke-ball.
Information in this section was contributed by pika chu.

Hint: Harder hitting attacks:
Hold A while attacking to do more damage.
Information in this section was contributed by Matt Golden.

Hint: Rare bird Pokemon locations:
Moltres (Victory Road), Articuno (Sea Foam Isle), Zapdos (Abandoned
power plant).
Information in this section was contributed by Cj.

Hint: Get all three beginning monsters at Oak's lab:
Note: Another Game Boy with the game and a link cable are required for
this trick. Transfer your Pokemon to the other Game Boy. Begin a new
game on the original Game Boy and get a monster that was not
collected in the first game and transfer it to the other Game Boy. Repeat
this step again, then transfer the monsters back to the original Game
Boy. This allows your game to have the three starting Pokemon
(Bulbasaur, Charmander, and Squirtle) plus any others that were already
captured.
Information in this section was contributed by Zapdos.

Hint: Getting level 100 and over Pokemon:
Go to Viridian City and talk to the old man. When he asks if you are in a
hurry, answer "No". After he explains how to catch a Weedle, fly to
Cinnabar Island. Surf on the side of Cinnabar that faces the Seafoam
Islands. In addition to the Missingno Pokemon, regular Pokemon over
level100 will be encountered. Note: After any Pokemon over level 100
gains any experience points, it will drop to level 100.
Information in this section was contributed by Phil Abbate and Butrice99.

You can raise the Pokemon with rare candies up to level 255. After that,
they return to level 0. Note: The Pokemon available may vary from
cartridge to cartridge.

Hint: Chrona Myuu:
Myuu can evolve into Chrona Myuu. Go to the Seafoam Islands and use
the Itemfinder to locate the Mist Stone. There is only one, and is very
difficult to find.
Information in this section was contributed by Shorty.

Hint: Kangaskhan:
Go to Fuschia and surf until reaching Sea Foam Island. Surf up and down
until M Pokemon appears. Catch it, nickname it, and use one rare candy
on it to evolve it into Kangaskhan.
Information in this section was contributed YangVA10.

Hint: Get Mewto:
To get Mewto, the rarest of all Pokemon (#150), defeat Pokemon
League, and enter the cave in Cerulean city. Mewto is located deep
within the cave.
Information in this section was contributed by Stone Cold Claydoh and Barrett Steinberg.

Hint: Get Mewtwo at level 141:
Use the "Unlimited items" trick and stay at the Seafoam Islands. Search
for Mewtwo where Pokemon "M" was found. Keep searching up and down
the shores of Seafoam Islands until Mewtwo is found. Note: Mewtwo
may only be caught with Ultra Balls. At least 10 Ultra Balls may be
needed in order to catch him.
Information in this section was contributed by AndyJ.tOrReS.

Hint: Getting Mew (Japanese version):
Collect all 150 Pokemon. There is a man in Celadon city in the building
where Eevee was found that gives you a very special Pokemon. He is
located by taking the path that leads behind the buildings at the
farthest north point of the city. There will be a secret door in the
building that is off set from the row. Climb the stairs to find a group of
people working on computers, when the building is entered from the
front. Talk to the man that is not working on a computer to collect Mew.
Information in this section was contributed by James Queen.

Go to Shion Town and change your Koiking's nickname to "Mew".
Highlight the thirteenth tool on the tool screen and press Select(8).
Attempt to change your Koiking's nickname again to any name. The
monster will flash, but the name will remain the same. Mew will now be
available.

Go to Cerulean Cave to catch Mew and Mewtwo.
Information in this section was contributed by Hitmonle12.

All Pokemon (Game Boy emulators):
Have any Pokémon saved game inside the "battery" folder (e.g.
PokeRed.sav). Rename the saved file to the opposite version (e.g.
PokeBlue.sav). Run the emulator and catch all the blue version Pokemon.
Rename the saved file to the original name (e.g. PokeRed.sav). You
should now have the Pokemon from the other version of the game.
Information in this section was contributed by Hitmonle12.

All Pokemon (Japanese version):
Note: This code requires two Game Boys, a link cable, and the red and
blue versions of the game. Begin game play and find your first monster.
Locate the Charmanders field and capture one of them. Link both Game
Boys and rapidly and repeatedly use the "Trade" option. All 150
monsters should now be available.

Raise your Pokemon to level 100 (Japanese version):
Go to the seventh item in "Tools" and press Select. Get into a fight,
then press Select on the attack you dislike to change it. Note: The
monster must have all four attack spaces filled. Win the fight. Your
monster will become level 100 and will enter the next stage of its life, if
available.