TM15 Hyper Beam in Emerald.

Hyper Beam. A TM is used up when taught; one copy, one Pokemon. 189 species in Pokemon Emerald can learn it.

Venusaur, Charizard, Blastoise, Butterfree, Beedrill, Pidgeot, Raticate, Fearow, Arbok, Raichu, Sandslash, Nidoqueen, Nidoking, Clefable, Ninetales, Wigglytuff, Golbat, Vileplume, Parasect, Venomoth, Dugtrio, Persian, Golduck, Primeape, Arcanine, Poliwrath, Alakazam, Machamp, Victreebel, Tentacruel, Golem, Rapidash, Slowbro, Magneton, Dodrio, Dewgong, Muk, Cloyster, Gengar, Hypno, Kingler, Electrode, Exeggutor, Marowak, Lickitung, Weezing, Rhydon, Chansey, Tangela, Kangaskhan, Seadra, Seaking, Starmie, Mr. Mime, Scyther, Jynx, Electabuzz, Magmar, Pinsir, Tauros, Gyarados, Lapras, Vaporeon, Jolteon, Flareon, Porygon, Omastar, Kabutops, Aerodactyl, Snorlax, Articuno, Zapdos, Moltres, Dratini, Dragonair, Dragonite, Mewtwo, Mew, Meganium, Typhlosion, Feraligatr, Furret, Noctowl, Ledian, Ariados, Crobat, Lanturn, Togetic, Xatu, Ampharos, Bellossom, Azumarill, Politoed, Jumpluff, Sunflora, Quagsire, Espeon, Umbreon, Slowking, Forretress, Steelix, Granbull, Scizor, Heracross, Ursaring, Magcargo, Piloswine, Remoraid, Octillery, Houndoom, Kingdra, Donphan, Porygon2, Miltank, Blissey, Raikou, Entei, Suicune, Larvitar, Pupitar, Tyranitar, Lugia, Ho-Oh, Celebi, Sceptile, Blaziken, Swampert, Mightyena, Linoone, Beautifly, Dustox, Ludicolo, Nuzleaf, Shiftry, Swellow, Pelipper, Gardevoir, Masquerain, Breloom, Slaking, Ninjask, Shedinja, Exploud, Hariyama, Delcatty, Mawile, Aggron, Medicham, Manectric, Swalot, Sharpedo, Wailord, Camerupt, Grumpig, Trapinch, Vibrava, Flygon, Cacturne, Altaria, Lunatone, Solrock, Whiscash, Crawdaunt, Claydol, Cradily, Armaldo, Milotic, Banette, Dusclops, Tropius, Absol, Glalie, Walrein, Huntail, Gorebyss, Relicanth, Salamence, Metang, Metagross, Regirock, Regice, Registeel, Latias, Latios, Kyogre, Groudon, Rayquaza, Jirachi, Deoxys Normal