Cheats without Gameshark/GameGenie
The sorce of at least half of these cheats is the coast of Cinnibar Island, the nintendo guys really messed up here. A strange pokemon can be found, and used in many crazy ways here. Its called "missingno.", but doesn't actually show up on your pokedex.
Warning the missingno. can destroy the game into little bits, trust me I tried. So I wouldn't advise catching it. Even seeing it will mess up the hall of fame.
First off to see missingno. you must talk to the guy in Viridian City who shows you how to catch a pokemon, after talking wtih him and letting him show you how to catch a weedle fly to Cinibar Island. If you now surf on the coast you can see misingno., and many other weird pokemon. Some of these pokemon have levels over 100! Catch em if you can, but after one win they go to lvl 100.
If you see a missingno. you may notice a strang mark after a 9 on your 6th item. this is sort of a place holder, because you now have over 100 of these! This is a great way to get more items such as master ball, and PPup, which you only have a few of.
Not only can you see such pokemon as missingno. on the coast, but also if you leave the saffari zone early and go to the coast you will see saffari zone pokemon there! In fact there are a lot of places you see pokemon that will show up on Cinibar Island's coast.
An other thing that will determin what you see is your name, below are some names and pokemon you get with them.
Name Used Pokemon seen
RED Mewtwos and Golbats and Magnemites
ASH Snorlaxs and Golbats
Syran squirtles, magnemites
DAVE Alakazams
Ash Nidokings
GARY marowak lvl:135; clefable lvl:various; electrode lvl:80/132
AXLE Aerodactyls, Meowths
Chris Charmeleons, Squirtles
BOB LVL142 Hypnos
Ronnie also BRIAN Electrode and Muk
GARRETT Snorlaxes, haunters and Marowaks
Jamie Rapidashes
Eric Nidorinas
BLUE golem pidgey alakazam and occasionally Fight Prof oak!
matmac Haunter and Mewtwo
Jon-AshJ Golduck Magenemite and Nidorino
JOHN Snorlax Golbat + fight professor oak
dave golbat,golduck,alakazam,spearow,cloyster,starmie
MYLES Cloyster
Flareon Sorlax, Electrode, Golduck
CARLEANE MEW
Kyle Aerodacty
And usually if you surf at the bottom of the coast (on the right side) you will run into a Tangela (hehehe, now you don't have a bundles anymore!)
Fishing in statues: If you fish in the statues of the Cerulean City gym you can sometimes find rare water pokemon.
Free Coins: Go around the Game Corner Pressing A
Pokemon Modifier
Fight any Pokemon
In Pokemon (Red Version):
xx1-91A-F7C
xx1-93A-7FE
xx1-9BA-5DB
In Pokemon (Blue Version):
xx1-91A-F7C
xx1-93A-7FE
xx1-9BA-6EB
replace the xx with the numbers in front of the pokemon
99 Bulbasaur
09 Ivysaur
9A Venusaur
B0 Charmander
B2 Charmeleon
B4 Charizard
B1 Squirtle
B3 Wartortle
1C Blastoise
7B Caterpie
7C Metapod
7D Butterfree
70 Weedle
71 Kakuna
72 Beedrill
24 Pidgey
96 Pidgeotto
97 Pidgeot
A5 Rattata
A6 Raticate
05 Spearow
23 Frearow
6C Ekans
2D Arbok
54 Pikachu
55 Raichu
60 Sandshrew
61 Sandslash
0F Nidoran(F)
A8 Nindorina
10 NidoQueen
03 Nidoran(M)
A7 Nindorino
07 NidoKing
04 Clefairy
8E Clefable
52 Vulpix
53 Ninetales
64 Jigglypuff
65 Wigglytuff
6B Zubat
82 Golbat
B9 Oddish
BA Gloom
BB Vileplume
6D Paras
2E Parasect
41 Venonat
77 Venomoth
3B Diglett
76 Dugtrio
4D Meowth
90 Persian
2F Psyduck
80 Goldduck
39 Mankey
75 Primeape
21 Growlithe
14 Arcanine
47 Poliwag
6E Poliwhirl
6F Poliwrath
94 Abra
26 Kadabra
95 Alakazam
6A Machop
29 Machoke
7E Machamp
BC Bellsprout
BD Weepinbell
BE Victreebell
18 Tentacool
9B Tentacruel
A9 Geodude
27 Graveler
31 Golem
A3 Ponyta
A4 Rapidash
25 Slowpoke
08 Slobro
AD Magnemite
36 Magneton
40 Farfetch'd
46 Doduo
74 Dotrio
3A Seel
78 Dewgong
0D Grimer
88 Muk
17 Shellder
8B Cloyster
19 Gastly
93 Haunter
0E Gengar
22 Onix
30 Drowzee
81 Hypno
4E Krabby
8A Kingler
06 Voltorb
8D Electrode
0C Exeggcute
0A Exeggutor
11 Cubone
91 Marowak
2B Hitmonlee
2C Hitmonchan
0B Lickitung
37 Koffing
8F Weezing
12 Rhyhorn
01 Rhydon
28 Chansey
1E Tangela
02 Kangaskhan
5C HorSea
5D SeaDra
9D Goldeen
9E Seaking
1B Staryu
98 Starmie
2A Mr. Mime
1A Scyther
48 Jynx
35 Electabuzz
33 Magmar
1D Pinsir
3C Tauros
85 Magikarp
16 Gyarados
13 Lapras
4C Ditto
66 Eevee
69 Vaporeon
68 Jolteon
67 Flareon
AA Porygon
62 Omanyte
63 Omastar
5A Kabuto
5B Kabutops
AB Aerodactyl
84 Snorlax
4A Articuno
4B Zapdos
49 Moltres
58 Dratini
59 Dragonair
42 Dragonite
83 Mewtwo
15 Mew
Get any Items
Viridian City:
xx4-44D-F7A
xx4-45D-C46
xx4-46D-D56
Pewter City:
xx4-4BD-F7A
xx4-4CD-B3A
xx4-4DD-91E
Cerulean City:
xx4-55D-F7A
xx4-56D-B3A
xx4-57D-912
Vermilion City:
xx4-63D-F7A
xx4-64D-A26
xx4-65D-D5E
Lavender Town:
xx4-6CD-E66
xx4-6DD-A26
xx4-6ED-3BE
Cinnibar Island:
xx4-BBD-E62
xx4-BCD-E66
xx4-BDD-A22
replace the xx with any numbers from list below.
01=Master Ball (for free)
02=Ultra Ball
03=Great Ball
04=Pok�Ball
05=Town Map
06=Bicycle
07=Surf
08=Safari Ball
09=Pokedex
0A=Moon Stone
0B= Antidote
0C=Burn Heal
0D=Ice Heal
0E=Awakening
0F=Parlyz. Heal
10=Full Restore
11=Max Potion
12=Hyper Potion
13=Super Potion
14=Potion
15=Boulderbadge
16=Cascadebadge
17=Thunderbadge
18=Rainbowbadge
19=Soulbadge
1A=Marshbadge
1B=Volcanobadge
1C=Earthbadge
1D=Escape Rope
1E=Repel
1F=Old Amber
20=FireStone
21=ThunderStone
22=WaterStone
23=HP Up
24=Protein
25=Iron
26=Carbos
27=Calcium
28=Rare Candy
29=Dome Fossil
2A=Helix Fossil
2B=Secret Key
2E=X Accuracy
2F=Leaf Stone
31=Nugget
32=PP UP
33=PokeDoll
34=Full Heal
35=Revive
36=Max Revive
37=Gaurd Spec
38=Super Repel
39=Max Repel
3A=Dire Hit
38=Coin
3C=Fresh Water
3D=Soda Pop
3E=Lemonade
41=X Attack
42=X Defend
43=X Speed
44=X Special
4B=Exp.All
4F=PP Up
50=Ether
51=Max Ether
52=Elixer
53=Max Elixer
FA=Substitute
F9=Tri Attack
F8=Rock Slide
F7=Explosion
F6=Psywave
F5=Thunder Wave
F4=Rest
F3=Sky Attack
F2=Dream Eater
F1=Softboiled
F0=Skull Bash
EF=Swift
EE=Fire Blast
EC=Self Destruct
EB=Metronome
EA=Bide
E9=Reflect
E8=Double Team
E7=Mimic
E6=Teleport
E5=Psychic
E4=Dig
E3=Fissure
E2=Earthquake
E1=Thunder
E0=Thunderbolt
DF=Dragon Rage
DE=Solar Beam
DD=Mega Drain
DC=Rage
DB=Seismic Toss
DA=Counter
D9=Submission
D8=Pay Day
D7=Hyper Beam
D6=Blizzard
D5=Ice Beam
D4=Water Gun
D3=Bubblebeam
D2=Double Edge
D1=Take Down
D0=Body Slam
CF=Horn Drill
CE=Toxic
CD=Mega Kick
CC=Whirlwind
CB=Sword's Dance
CA=Razor Wind
C9=Mega Punch
C8=Flash
C7=Strength
C6=Surf
C5=Fly
C4=Cut
Pokemon Modifier
This code will change the pokemons you meet into any pokemon:
Just enter this code 01XXD8CF
Replace the XX with the digit code you want
-The pokemon might appear messed up. But once you catch it, it'll turn out fine
DIGIT CODES
99 Bulbasaur
09 Ivysaur
9A Venusaur
B0 Charmander
B2 Charmeleon
B4 Charizard
B1 Squirtle
B3 Wartortle
1C Blastoise
7B Caterpie
7C Metapod
7D Butterfree
70 Weedle
71 Kakuna
72 Beedrill
24 Pidgey
96 Pideotto
97 Pidgeot
A5 Rattata
A6 Raticate
05 Spearow
23 Fearow
6C Ekans
2D Arbok
54 Pikachu
55 Raichu
60 Sandshrew
61 Sandslash
0F Nidoran (F)
A8 Nidorina
10 Nidoqueen
03 Nidoran (M)
A7 Nidorino
07 Nidoking
04 Clefairy
8E Clefable
52 Vulpix
53 Ninetails
64 Jigglypuf
65 Wigglytuff
6B Zubat
82 Golbat
B9 Oddish
BA Gloom
BB Vileplume
6D Paras
2E Parasect
41 Venonat
77 Venomoth
3B Diglette
76 Dugtrio
4D Meowth
90 Persian
2F Psyduck
80 Golduck
34 Mankey
75 Primeape
21 Growlithe
14 Arcanine
47 Polywag
6E Polywhirl
6F Polywrath
94 Abra
26 Kadabra
95 Alakazam
6A Machop
29 Machoke
7E Machamp
BC Bellsprout
BD Weepinbell
BE Victreebell
18 Tentacool
9B Tentacruel
A9 Geodude
27 Graveler
31 Golem
A3 Ponyta
A4 Rapidash
25 Slowpoke
08 Slowbro
AD Magnemite
36 Magneton
40 Farfetch'd
46 Doduo
74 Dodrio
3A Seel
78 Dewgong
0D Grimer
88 Muk
17 Shellder
8B Cloyster
19 Gastly
93 Haunter
0E Gengar
22 Onix
30 Drowzee
81 Hypno
4E Krabby
8A Kingler
06 Voltorb
8D Electrode
0C Exeggcute
0A Exegguter
11 Cubone
91 Marowak
2B Hitmonlee
2C Hitmonchan
0B Lickitung
37 Koffing
8F Weezing
12 Rhyhorn
01 Rhydon
28 Chansey
1E Tangela
02 Kangaskhan
5C Horsea
9D Goldeen
9E Seaking
1B Staryu
98 Starmie
2A Mr. Mime
1A Scyther
48 Jynx
35 Electabuzz
33 Magmar
1D Pinsir
3C Tauros
85 Magikarp
16 Gyarados
13 Lapras
4C Ditto
66 Evve
69 Vaporeon
68 Jolteon
67 Flareon
AA Porygon
62 Omanite
63 Omanstar
5A Kabuto
5B Kabutops
AB Aerodactyl
84 Snorlax
4A Articuno
4B Zapdos
49 Moltres
58 Dratini
59 Dragonair
42 Dragonite
83 Mewtwo
15 Mew (Nintendo won't allow these in tournaments, we have nearly figured out how to get one without using a gameshark!)
B7 Missingno.