trading

Trade 1:
C: anything
S: Cyndaquil

Trade 2:
C: Cyndaquil, Chikorita
S: Totodile, Jigglypuff

Trade 3:
C: Croconaw, Growlithe, Weezing
S: Quilava, Vulpix, Mareep

Trade 4:
C: anything
Y: Charmander, Squirtle, Jolteon, Hitmonlee

Trade 5:
S: anything
Y: Bulbasaur, Dragonair, Pidgeot, Kabuto

Trade 6:
C: Charmander, Squirtle, Jolteon, Hitmonlee, Spinarak, Ariados
S: Bulbasaur, Dragonair, Pidgeot, Kabuto, Flaaffy, Sunflora

Trade 7:
C: Kabuto, Dragonair, Farfetch'd
Y: Pikachu, Kabuto, Mankey

Trade 8:
C: Weedle, Koffing, Ekans, Arbok, Graveler, Alakazam
Y: Omanyte, Clefable, Flareon, Arcanine, Kadabra, Golem

Trade 9:
C: Omanyte, Ivysaur, Ampharos, Flareon, Typhlosion, Golem
S: Wartortle, Charmeleon, Lugia, Magmar, Vaporeon, Girafarig

Trade 10:
C: Pupitar, Blastoise, Charizard, Kabutops, Slugma, Arcanine
S: Venusaur, Omastar, Bayleef, Tyrogue, Seel, Horsea

Trade 11:
C: Omastar, Venusaur, Vaporeon, Magmar, Vulpix, Machoke, Gengar
Y: Dragonite, Porygon, Mewtwo, Articuno, Zapdos, Haunter, Machamp

Trade 12:
S: Blastoise, Charizard, Kabutops, Meowth, Persian, Jynx
Y: Alakazam, Gengar, Ninetales, Moltres, Hitmonchan, Parasect

Trade 13:
S: Electabuzz, Weezing, Hitmonlee, Raichu, Jolteon
Y: Magneton, Lapras, Primeape, Dewgong, Rhydon

Trade 14:
C: Dragonite, Mewtwo, Articuno, Zapdos, Machamp, Meganium
S: Ninetales, Moltres, Hitmonchan, Parasect, Magneton, Primeape

Trade 15:
C: Espeon, Umbreon, Togetic, Pichu, Cleffa, Igglybuff
S: Tyranitar, Magcargo, Houndoom, Dewgong, Feraligatr, Cloyster

Trade 16:
C: Smoochum, Elekid, Magby, Mankey, Piloswine, Granbull
S: Blissey, Crobat, Misdreavus, Natu, Smeargle, Forretress

Trade 17:
C: Ho-oh, Teddiursa, Ursaring, Mantine, Gligar, Bellossom
S: Rapidash, Aerodactyl, Poliwrath, Lapras, Nidoking, Nidoqueen

Trade 18:
C: Slowpoke, Politoed, Onix, Scizor, Porygon, Kingdra, Clefairy, Hitmontop, Slowbro
S: Poliwhirl, Slowking, Scyther, Steelix, Seadra, Porygon-2, Remoraid, Xatu