TM06 Toxic in FireRed.

Toxic. A TM is used up when taught; one copy, one Pokemon. 372 species in Pokemon FireRed can learn it.

Bulbasaur, Ivysaur, Venusaur, Charmander, Charmeleon, Charizard, Squirtle, Wartortle, Blastoise, Butterfree, Beedrill, Pidgey, Pidgeotto, Pidgeot, Rattata, Raticate, Spearow, Fearow, Ekans, Arbok, Pikachu, Raichu, Sandshrew, Sandslash, Nidoran (female), Nidorina, Nidoqueen, Nidoran (male), Nidorino, Nidoking, Clefairy, Clefable, Vulpix, Ninetales, Jigglypuff, Wigglytuff, Zubat, Golbat, Oddish, Gloom, Vileplume, Paras, Parasect, Venonat, Venomoth, Diglett, Dugtrio, Meowth, Persian, Psyduck, Golduck, Mankey, Primeape, Growlithe, Arcanine, Poliwag, Poliwhirl, Poliwrath, Abra, Kadabra, Alakazam, Machop, Machoke, Machamp, Bellsprout, Weepinbell, Victreebel, Tentacool, Tentacruel, Geodude, Graveler, Golem, Ponyta, Rapidash, Slowpoke, Slowbro, Magnemite, Magneton, Farfetch'd, Doduo, Dodrio, Seel, Dewgong, Grimer, Muk, Shellder, Cloyster, Gastly, Haunter, Gengar, Onix, Drowzee, Hypno, Krabby, Kingler, Voltorb, Electrode, Exeggcute, Exeggutor, Cubone, Marowak, Hitmonlee, Hitmonchan, Lickitung, Koffing, Weezing, Rhyhorn, Rhydon, Chansey, Tangela, Kangaskhan, Horsea, Seadra, Goldeen, Seaking, Staryu, Starmie, Mr. Mime, Scyther, Jynx, Electabuzz, Magmar, Pinsir, Tauros, Gyarados, Lapras, Eevee, Vaporeon, Jolteon, Flareon, Porygon, Omanyte, Omastar, Kabuto, Kabutops, Aerodactyl, Snorlax, Articuno, Zapdos, Moltres, Dratini, Dragonair, Dragonite, Mewtwo, Mew, Chikorita, Bayleef, Meganium, Cyndaquil, Quilava, Typhlosion, Totodile, Croconaw, Feraligatr, Sentret, Furret, Hoothoot, Noctowl, Ledyba, Ledian, Spinarak, Ariados, Crobat, Chinchou, Lanturn, Pichu, Cleffa, Igglybuff, Togepi, Togetic, Natu, Xatu, Mareep, Flaaffy, Ampharos, Bellossom, Marill, Azumarill, Sudowoodo, Politoed, Hoppip, Skiploom, Jumpluff, Aipom, Sunkern, Sunflora, Yanma, Wooper, Quagsire, Espeon, Umbreon, Murkrow, Slowking, Misdreavus, Girafarig, Pineco, Forretress, Dunsparce, Gligar, Steelix, Snubbull, Granbull, Qwilfish, Scizor, Shuckle, Heracross, Sneasel, Teddiursa, Ursaring, Slugma, Magcargo, Swinub, Piloswine, Corsola, Remoraid, Octillery, Delibird, Mantine, Skarmory, Houndour, Houndoom, Kingdra, Phanpy, Donphan, Porygon2, Stantler, Tyrogue, Hitmontop, Smoochum, Elekid, Magby, Miltank, Blissey, Raikou, Entei, Suicune, Larvitar, Pupitar, Tyranitar, Lugia, Ho-Oh, Celebi, Treecko, Grovyle, Sceptile, Torchic, Combusken, Blaziken, Mudkip, Marshtomp, Swampert, Poochyena, Mightyena, Zigzagoon, Linoone, Beautifly, Dustox, Lotad, Lombre, Ludicolo, Seedot, Nuzleaf, Shiftry, Taillow, Swellow, Wingull, Pelipper, Ralts, Kirlia, Gardevoir, Surskit, Masquerain, Shroomish, Breloom, Slakoth, Vigoroth, Slaking, Nincada, Ninjask, Shedinja, Whismur, Loudred, Exploud, Makuhita, Hariyama, Azurill, Nosepass, Skitty, Delcatty, Sableye, Mawile, Aron, Lairon, Aggron, Meditite, Medicham, Electrike, Manectric, Plusle, Minun, Volbeat, Illumise, Roselia, Gulpin, Swalot, Carvanha, Sharpedo, Wailmer, Wailord, Numel, Camerupt, Torkoal, Spoink, Grumpig, Spinda, Trapinch, Vibrava, Flygon, Cacnea, Cacturne, Swablu, Altaria, Zangoose, Seviper, Lunatone, Solrock, Barboach, Whiscash, Corphish, Crawdaunt, Baltoy, Claydol, Lileep, Cradily, Anorith, Armaldo, Feebas, Milotic, Castform, Kecleon, Shuppet, Banette, Duskull, Dusclops, Tropius, Chimecho, Absol, Snorunt, Glalie, Spheal, Sealeo, Walrein, Clamperl, Huntail, Gorebyss, Relicanth, Luvdisc, Bagon, Shelgon, Salamence, Metang, Metagross, Regirock, Regice, Registeel, Latias, Latios, Kyogre, Groudon, Rayquaza, Jirachi, Deoxys Normal