Get Ice Beam TM
Go to Celadon Dept. Store, go to the rooftop square. Get a bottle of Fresh Water, go talk to the girl who always wants a drink. Give the Fresh Water to her, she will give you TM13, which contains Ice Beam.

Get Eevee
If you are in front of the Celadon City Pokemon Center, go right three squares, go up until you run into bushes, go left until you see an opening in the bushes. When you see the opening, go into it. Then, go left unil you see an opening behind a building. Go into that. Then, go up the steps until they stop. Go right, you will run into a wall, then go down. You will see a door, go into it. You will see an Item Ball on a table. Get it. It contains Eevee.

Get Bulbasaur
To get Bulbasaur beat misty nugget bridge and get to bill`s house. Defeat the rocket and get Dig. Go back to the house and she will give you Bulbasaur!

Secret Coins
At the Game Corner there are secret coins lying around. You can get these coins by walking around and pressing the A button.

Only Way to Get Mew
We've seen so many fake Mew codes pop up on the web (and we get about 20 new fake Mew code submissions A DAY) that we've decided to add this following disclaimer to our codes section:

According to Nintendo, Mew cannot be found or caught in Pokemon Yellow, Red, or Blue. Outside of a GameShark code (which may mess up your Pokedex and render the game incompatible with Pokemon Stadium), the #151st Pokemon remains a cool litte extra that is only handed out by Nintendo on special occasions, such as Mall Tours or Pokemon events.

However, all those who want to catch a glimpse of the rare Pokemon can select Mew as a rental Pokemon in Pokemon Stadium for Nintendo 64 (but you cannot upload it to your Game Boy game). Note that Mew is just that -- a bonus Pokemon (albeit a very cool one that can learn all TMs) -- and not technically required to complete your Pokedex

How to get two HMs in Fuchsia City
If you are stumped on where to get the "Surf" HM, Here's what you do. It's in Area 3 of the Safari Zone. You will have to get there fast as well. (I used a bike, I suggest you use it if you have it.) If you get into the secret hideaway in area 3, the man will give you the "Surf" HM. The gold teeth item is also in Area 3. Give the gold teeth to the owner of the Safari zone and he will give you the "Strength" HM. Use that to move the boulder and claim the item in the owners house.

Get Amnesia Psyduck
Have you ever wondered how you can get the elusive Amnesia technique? Well, it's hidden deep in Pokemon Stadium for the Nintendo 64. Unlocking it will take a while, but it's definitely worth it. You have to register ALL 151 Pokemon in the Hall of Fame. Whenever you beat a tournament (or Gym Leader Castle), your six Pokemon are entered into the Hall of Fame. It doesn't matter whether you use rental Pokemon or your own, but you can't have any gaps. Once you've filled it all up, you are awarded a free Psyduck bonus Pokemon that knows the Amnesia technique. You can now upload it to your Game Boy pak and use it in your quest.

Get Squirtle
To get Squirtle first you must beat Lt. Surge. Then go talk to officer jenny in the middle of the city and she will give you Squirtle.

Get Raichu
To get Raichu, trade the Pikachu you started with to a Red/Blue version after It gets to be about Lv. 50-60. Then use a Thunderstone on the Pikachu you traded. After it evolves, trade it back to Pokemon Yellow. Now you will have Raichu. Be careful, though. Pikachu will no longer follow you around if you do this. You may be much better off just trading a Pikachu caught in Red/Blue and evolving that one.

Get the Mimic TM
Buy a Pokedoll in Celadon Mart, then FLY to Saffron and talk to the Copycat. She will give you the Mimic TM.

Get Mewtwo
You can only get Mewtwo after you have beaten the game. First go to Cerulean City and go past the five trainers. Take a left and you are in a grassy area. Then continue down the water (you need Surf to get in the water) until you see land. Get on that land and enter the dungeon (if you haven't finished the game, a guy will be blocking the entrance). Work yourself through the dungeon until you're on the bottom floor. You will see Mewtwo. Use your Master Ball to catch it.

Get Charmander
Go to Cerulean city and beat the five trainers on the bridge going north, then go in to the first square walk away and then talk to the guy in it, he will give you Charmander.

Get Surfing Pikachu
Did you ever notice the small house at the northern beach of Route 19 that wasn't in Pokémon Blue and Red? This hut is home to the infamous "Surfing Pikachu" mini-game. Here's the deal: if your Pikachu knows Surf, you can play the mini-game Pikachu's Beach right here. The only problem is that Pikachu can't learn Surf... Well, at least not in Pokémon Yellow. Here's how you get Surfing Pikachu (outside of winning a Nintendo Pokemon contest):

Surfing Pikachu is hidden in Pokémon Stadium for the Nintendo 64. To teach your Pikachu Surf (a technique it can normally not learn), you need to first unlock the R-2 (Round 2) mode. Then do the following:

Enter the R-2 Prime Cup's Master Ball division (you have to beat the first three divisions first).
Assemble a team that contains a Pikachu that does not yet know Surf. You HAVE to use a Pikachu from your Game Boy game. You cannot unlock Surfing Pikachu using a Rental Pokémon.
Do not register your team! Pick it directly from your Game Boy cartridge.

You now have to beat the Prime Cup's Master Ball division using a three-Pokémon team that always contains Pikachu. Pikachu has to be in every one of the eight battles.
You are not allowed to use any continues. If you do, you won't get Surfing Pikachu.
Once you have fulfilled all the above conditions, you are shown an award screen with Pikachu standing on a surfboard. From here on, Pikachu can use the Surf technique both in battle and during gameplay (Game Boy versions only). In Pokémon Yellow, you can now also access the hidden Surfing Pikachu mini-game. Simply go to the small hut on the northern beach of Route 19 and talk to the guy inside.

There is also a GameShark code that lets you access Surfing Pikachu, but we advise against using it, since it can mess up your Pokédex and save data. It's not worth the trouble.

Cheap Potions
When you reach Celadon City, go to the top (6th) floor of the Poke Mart and press A next to the machines and chose Lemonade. Lemonade replenishes 80 HP on a Pokemon, and it only costs 350 -- wich is a lot less than Hyper Potion.

Celadon City Slot Tip
All of the slot machines have different odds, which change every time. Play each machine 4 times, and if it hits 2 or more, then stick with that one, because it's probably hot.

If the slow machine forces you really close to a 777 or Bar Bar Bar it will probably give you one or the other soon.

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.
Note: Do not attempt this trick with any saved games you wish to keep, as it can corrupt those files if done incorrectly.

Cut Down Grassy Areas
Once you get the HM "cut", your pokemon can cut down grassy areas. Use "cut" and it will cut a two by two area. Wild Pokemon will not attack you in the area you cut.

Easy Level Gain
To easily gain experience, simply switch the Pokémon you want to train with the top Pokémon on your list. When you go into battle the Pokémon will pop out. You can then switch to another Pokémon. Once you win the battle the beginning Pokémon and the fighting Pokémon will both gain experience points.

Boss Tactics
Here are your best bets for beating the Pokemon Gym Leaders:

Brock: Use water or grass Pokemon against this rock trainer.
Misty: Use grass pokemon or electric to defeat this gym leader.
Leiutenant Surge: use a rock or ground pokemon and he's toast.
Erika: Use fire pokemon or flight against this plant lover and shatter her dreams of fighting you again.
Sabrina: Use bug or ghost against this psychomaniac and she is a goner.
Koga: This poison pokemon lover will be deafeted easily by using psy pokemon.
Blaine: This fire trainer will use fire pokemon against you so you can use water or ice.
Final boss: Giovanni, the team rocket leader, is the final gym leader - use water, ice, plant and he's out of there (and talk to him again and he says something to you).
In the Indigo Plateu you find 5 pokemon masters. Use this pokemon lineup for a better chance of success:

Plant
Water, Plant, Flight, Ice
Psy
Ice or Dragon
Your choice
Good Luck!

Easy Catch
When you are catching a pokemon. through the pokeball and press B and down at the same time(2 times),then press down untell you have your pokemon.

Get Mewto Without Masterball
When you battle Mewtwo make sure you have some poke balls. Use your Pikachu to get him down to low health and paralyze him and when it says Mewtwo's fully paralyzed throw a poke ball at him and it should work.