CHEATS
This is the cheats section, and all of these cheats have been verified. That means there are no false codes!
New Code: Cinnabar Island Mewtwos - No GameShark required!
At the beginning of the game, when you're selecting your name, put A in the second space and D in the third, and you'll fight L128 Mewtwos on the coast of Cinnabar Island.
Pokemon Yellow:
For the Surfing Pikachu, just add Surf to Pikachu's attack list. This code will erase the second attack Pikachu has and replace it with surf, so switch to the attack you want to get rid of first. The code is 013973D1.
WITHOUT GameGenie/GameShark:
1. Capturing Pokémon Trick: Hold Up and B while the ball is thrown and until the ball breaks or captures the Pokémon.
Description: This will increase the chance of catching a Pokémon, but do not guarantee it.
2. Item Duplication Trick: Talk to the guy who teaches you to use a Pokéball in Viridian, then fly to Cinnabar and move the item you want to duplicate in the 6th slot. Swim up and down the coast (half-sea and half-land) on the right side of Cinnabar and you MAY run into a Missingno.
Description: This will make more than 100 copies of the item in your 6th slot. (Only countable items can be duplicated, not something like Old Amber or Helix Fossil)
3. Catching Safari Zone Pokémon: After you run out of time or Safari Balls in the Safari Zone, fly to Cinnabar and swim up and down the right coast (half-sea and half-land) and you MAY run into Safari Zone Pokémon.
Description: No more baits or rocks! Now you can weaken the Pokémon and catch it the easy way!
NOTE: THESE CODES MAY NOT WORK ON YELLOW VERSION, ESPECIALLY #2.
WITH GameGenie/GameShark:
In case you're wondering, the two numbers/letters at the last column of the Item List section are for the next code.
To choose an Item to buy, put in the code, then go to the items section for the corresponding item code and replace the "xx" with it.
GAME GENIE
Viridian City Market
xx4-44D-F7A (1st slot)
xx4-45D-C46 (2nd slot)
xx4-46D-D56 (3rd slot)
Pewter City Market
xx4-4BD-F7A (1st slot)
xx4-4CD-B3A (2nd slot)
xx4-4DD-91E (3rd slot)
Cerulean City Market
xx4-55D-F7A (1st slot)
xx4-56D-B3A (2nd slot)
xx4-57D-912 (3rd slot)
GAME SHARK (doesn't matter which mart)
01xx7CCF (1st slot)
01xx7DCF (2nd slot)
01xx7ECF (3rd slot)
01xx7FCF (4th slot)
Note: replace "xx" with C4 to FF will give you one of the HM/TMs, I will place the exact codes once the TM/HM section is up.
If you need unlimited cash, enter 996-11B-E6A, turn off the code, buy two pokeballs and turn on the code, sell the pokeballs one at a time, and turn off the code again. Now you should have about 900000 bucks!
For Infinite Energy, put 01FF16D0 as a Game Shark code.
If you put in 019947D3 on your Game Shark, you can get infinite cash.
Don't want to fight random enemies? Use the Repel Mode by putting 01033CD1 into the Game Shark.
To start with a Pokémon of your choice, use this Game Shark code: 01xx1ED1
For Pokémon select, put xx1-91A-7FC, and replace the "xx" with a Pokemon code. Now go to the fields to the west (left) of Cerulean City, and you'll fight the Pokémon you picked in a while. The Game Shark code for this trick is 01xxD8CF.
B7 Missing No. 000 99 Bulbasaur 001 09 Ivysaur 002 9A Venusaur 003 B0 Charmander 004 B2 Charmeleon 005 B4 Charizard 006 B1 Squirtle 007 B3 Wartortle 008 1C Blastoise 009 7B Caterpie 010 7C Metapod 011 7D Butterfree 012 70 Weedle 013 71 Kakuna 014 72 Beedrill 015 24 Pidgey 016 96 Pidgeotto 017 97 Pidgeot 018 A5 Rattata 019 A6 Raticate 020 05 Spearow 021 23 Fearow 022 6C Ekans 023 2D Arbok 024 54 Pikachu 025 55 Raichu 026 60 Sandshrew 027 61 Sandslash 028 0F Nidoran-F 029 A8 Nidorina 030 10 NidoQueen 031 03 Nidoran-M 032 A7 Nidorino 033 07 NidoKing 034 04 Clefairy 035 8E Clefable 036 52 Vulpix 037 53 Ninetales 038 64 Jigglypuff 039 65 Wigglytuff 040 6B Zubat 041 82 Golbat 042 B9 Oddish 043 BA Gloom 044 BB Vileplume 045 6D Paras 046 2E Parasect 047 41 Venonat 048 77 Venomoth 049 3B Diglett 050 76 Dugtrio 051 4D Meowth 052 90 Persian 053 2F Psyduck 054 80 Goldduck 055 39 Mankey 056 75 Primeape 057 21 Growlithe 058 14 Arcanine 059 47 Poliwag 060 6E Poliwhirl 061 6F Poliwrath 062 94 Abra 063 26 Kadabra 064 95 Alakazam 065 6A Machop 066 29 Machoke 067 7E Machamp 068 BC Bellsprout 069 BD Weepinbell 070 BE Victreebell 071 18 Tentacool 072 9B Tentacruel 073 A9 Geodude 074 27 Graveler 075 31 Golem 076 A3 Ponyta 077 A4 Rapidash 078 25 Slowpoke 079 08 Slowbro 080 AD Magnemite 081 36 Magneton 082 40 Farfetch'd 083 46 Doduo 084 74 Dodrio 085 3A Seel 086 78 Dewgong 087 0D Grimer 088 88 Muk 089 17 Shellder 090 8B Cloyster 091 19 Gastly 092 93 Haunter 093 0E Gengar 094 22 Onix 095 30 Drowzee 096 81 Hypno 097 4E Krabby 098 8A Kingler 099 06 Voltorb 100 8D Electrode 101 0C Exeggcute 102 0A Exeggutor 103 11 Cubone 104 91 Marowak 105 2B Hitmonlee 106 2C Hitmonchan 107 0B Lickitung 108 37 Koffing 109 8F Weezing 110 12 Rhyhorn 111 01 Rhydon 112 28 Chansey 113 1E Tangela 114 02 Kangaskhan 115 5C HorSea 116 5D SeaDra 117 9D Goldeen 118 9E Seaking 119 1B Staryu 120 98 Starmie 121 2A Mr. Mime 122 1A Scyther 123 48 Jynx 124 35 Electabuzz 125 33 Magmar 126 1D Pinsir 127 3C Tauros 128 85 Magikarp 129 16 Gyarados 130 13 Lapras 131 4C Ditto 132 66 Eevee 133 69 Vaporeon 134 68 Jolteon 135 67 Flareon 136 AA Porygon 137 62 Omanyte 138 63 Omastar 139 5A kabuto 140 5B Kabutops 141 AB Aerodactyl 142 84 Snorlax 143 4A Articuro 144 4B Zapdos 145 49 Moltres 146 58 Dratini 147 59 Dragonair 148 42 Dragonite 149 83 Mewtwo 150 15 Mew 151 00 Mysterio ???
Here is a Game Shark code that'll change the Pokémon on the top of your 6-Pokémon list to whatever Pokémon you selected. The select code is 01xx64D1, and you replace the "xx" with the same code sequence as above, but for a more specific list that includes some glitched Pokémon not listed above, click here.
If you want to change an existing item to an item of your choice, put it in the first slot and enter this code: 01xx1DD3.
Stat Modifiers: These cheats MAY wear off when you gain a level. Replace xx with a number from 00 to FF.
HP (1st Pokemon) 01xx6CD1
HP (2nd Pokemon) 01xx98D1
HP (3rd Pokemon) 01xxC4D1
HP (4th Pokemon) 01xxF0D1
HP (5th Pokemon) 01xx1CD2
HP (6th Pokemon) 01xx48D2
1st Attack PP (1st Pokemon) 01xx88D1
1st Attack PP (2nd Pokemon) 01xxB4D1
1st Attack PP (3rd Pokemon) 01xxE0D1
1st Attack PP (4th Pokemon) 01xx0CD2
1st Attack PP (5th Pokemon) 01xx38D2
1st Attack PP (6th Pokemon) 01xx64D2
2nd Attack PP (1stPokemon) 01xx89D1
2nd Attack PP (2nd Pokemon) 01xxB5D1
2nd Attack PP (3rd Pokemon) 01xxE1D1
2nd Attack PP (4th Pokemon) 01xx0DD2
2nd Attack PP (5th Pokemon) 01xx39D2
2nd Attack PP (6thPokemon) 01xx65D2
3rd Attack PP (1st Pokemon) 01xx8AD1
3rd Attack PP (2nd Pokemon) 01xxB6D1
3rd Attack PP (3rd Pokemon) 01xxE2D1
3rd Attack PP (4th Pokemon) 01xx0ED2
3rd Attack PP (5th Pokemon) 01xx3AD2
3rd Attack PP (6th Pokemon) 01xx66D2
4th Attack PP (1st Pokemon) 01xx8BD1
4th Attack PP (2nd Pokemon) 01xxB7D1
4th Attack PP (3rd Pokemon) 01xxE3D1
4th Attack PP (4th Pokemon) 01xx0FD2
4th Attack PP (5th Pokemon) 01xx3BD2
4th Attack PP (6th Pokemon) 01xx67D2
Level (1st Pokemon) 01xx8CD1
Level (2nd Pokemon) 01xxB8D1
Level (3rd Pokemon) 01xxE4D1
Level (4th Pokemon) 01xx10D2
Level (5th Pokemon) 01xx3CD2
Level (6th Pokemon) 01xx68D2
Max HP (1st Pokemon) 01xx8DD1
Max HP (2nd Pokemon) 01xxB9D1
Max HP (3rd Pokemon) 01xxE5D1
Max HP (4th Pokemon) 01xx11D2
Max HP (5th Pokemon) 01xx?3DD2
Max HP (6th Pokemon) 01xx69D2
Attack (1st Pokemon) 01xx8FD1
Attack (2nd Pokemon) 01xxBBD1
Attack (3rd Pokemon) 01xxE7D1
Attack (4th Pokemon) 01xx13D2
Attack (5th Pokemon) 01xx3FD2
Attack (6th Pokemon) 01xx6BD2
Defense (1st Pokemon) 01xx91D1
Defense (2nd Pokemon) 01xxBDD1
Defense (3rd Pokemon) 01xxE8D1
Defense (4th Pokemon) 01xx15D2
Defense (5th Pokemon) 01xx41D2
Defense (6th Pokemon) 01xx6DD2
Speed (1st Pokemon) 01xx93D1
Speed (2nd Pokemon) 01xxBFD1
Speed (3rd Pokemon) 01xxEBD1
Speed (4th Pokemon) 01xx17D2
Speed (5th Pokemon) 01xx43D2
Speed (6th Pokemon) 01xx6FD2
Special (1st Pokemon) 01xx95D1
Special (2nd Pokemon) 01xxC1D1
Special (3rd Pokemon) 01xxEDD1
Special (4th Pokemon) 01xx19D2
Special (5th Pokemon) 01xx45D2
Special (6th Pokemon) 01xx71D2