To modify the first card in a booster pack (actually it just adds an extra card, you still get the rares) use 01XX00C4
Fill in the XX with the card below.

Base Cards

Alakazam-90
Blastoise-43
Chansey-B8
Charizard-32
Clefairy-AB
Gyarados-58
Hitmonchan-88
Machamp-7F
Magneton-6B
Mewtwo-9D
Nidoking-19
Ninetales-34
Poliwrath-48
Raichu-67
Venusaur-0B
Zapdos-75
Beedrill-11
Dragonair-C0
Dugtrio-7A
Electabuzz-71
Pidgeotto-A4
Arcanine-38
Charmeleon-31
Dewgong-4C
Dratini-BF
Farfetch’d-B4
Growlithe-36
Haunter-97
Ivysaur-09
Jynx-9C
Kadabra-8F
Kakuna-10
Machoke-7E
Magikarp-57
Magmar-3B
Nidorino-18
Poliwhirl-47
Porygon-BD
Raticate- A8
Seel-4B
Wartortle-42
Abra-8E
Bulbasaur-08
Caterpie-0C
Charmander-30
Diglett-79
Doduo-B5
Drowsee-99
Gastly-94
Koffing-2A
Machop-7D
Magnemite-69
Metapod-0D
Nidoran(m)-17
Onix-83
Pidgey-A3
Pikachu-60
Poliwag-46
Ponyta-39
Rattata-A7
Sandshrew-77
Squirtle-41
Starmie-56
Strayu-55
Tangela-2C
Voltorb-6D
Vulpix-33
Weedle-0F
Clefairy Doll-CB
Computer Search-D6
Devolution Spray-DC
Imposter Proffeser Oak-C4
Item Finder-DA
Lass-C7
Pokemon Breeder-CA
Pokemon Trader-C9
Scoop Up-D5
Super Energy Removal-D1
Defender-D9
Energy Retrieval-CD
Full Heal-DF
Maintenance-E1
PlusPower-D8
Pokemon Centre-D3
Pokemon Flute-E2
Pokedex-D7
Proffesor Oak-C3
Revive-E0
Super Potion-DE
Bill-C5
Energy Removal-D0
Gust of Wind-DB
Potion-DD
Switch-D2
Double Colorless Energy-07
Fighting Energy-05
Fire Energy-02
Grass Energy-01
Lightning Energy-04
Psychic Energy-06
Water Energy-03

Jungle Cards:

Clefable-AC
Electrode-6F
Flareon-3E
Jolteon-73
Kangaskhan-B9
Mr.Mime-9B
Nidoqeen-16
Pideot-A6
Pinsir-2F
Scyther-2E
Snorlax-BE
Vaporeon-5B
Venomoth-22
Victreebel-25
Vileplume-1E
Wigglytuff-B0
Butterfree-0E
Dodrio-B6
Exeggutor-29
Fearow-AA
Gloom-1D
Lickitung-B7
Marowak-85
Nidorina-15
Parasect-20
Persian-B3
Primeape-7C
Rapidash-3A
Rhydon-8A
Seaking-54
Tauros-BA
Weepinbell-24
Bellsprout-23
Cubone-84
Eevee-BC
Exeggcute-28
Goldeen-53
JigglyPuff-AF
Mankey-7B
Meowth-B2
Nidoran(f )-14
Oddish-1C
Paras-1F
Pikachu-61
Rhyhorn-89
Spearow-A9
Venonat-21
Pokeball-D4

Fossil Cards:

Aerodactyl-8D
Articuno-5E
Ditto-BB
Dragonite-C2
Gengar-98
Haunter-96
Hitmonlee-87
Hypno-94
Kabutops-8C
Lapras-59
Magneton-6C
Mew-A2
Moltres-3F
Muk-27
Raichu-68
Zapdos-74
Arbok-13
Cloyster-4E
Gastly-95
Golbat-1B
Golduck-45
Golem-82
Graveler-81
Kingler-50
Magmar-3C
Omastar-5D
Sandslash78-
Seadra-52
Slowbro-93
Tentacruel-4A
Weezing-2B
Ekans-12
Geodude-80
Grimer-26
Horsea-51
Kabuto-8B
Krabby-4F
Omanyte-5C
Psyduck-44
Shellder-4D
Slowpoke-92
Tentacool-49
Zubat-1A
Mr. Fuji-C6
Energy Search-CF
Gambler-E3
Recycle-E4
Mysterious Fossil-CC

Promo Cards:

Arcanine-37
Moltres-40
Articuno-5F
Pikachu-62
Pikachu (Different Picture)-63
Flying Pikachu-64
Surfing Pikachu-65
Surfing Pikachu (Different Picture)-66
Electabuzz-70
Zapdos-76
Slowpoke-91
Mewtwo (Different Picture)-9E
Mewtwo-9F
Mew-A0
Jigglypuff-AD
Dragonite-C1
Imakuni?-C8
Super Enery Retrieval-CE
Card Pop Venusaur-0A
Card Pop Mew-A1

GB Cards

Tangela-2D
Meowth-B1
Marowak-86
Jigglypuff-AE
Flareon-3D
Vaporeon-5A
Jolteon-72
Ninetales-35
Magnemite-6A
Electrode-6E
Pidgeot-A5