As of Generation IX, the one-hit ko moves have remained as Fissure, Guillotine, Horn Drill, and Sheer Cold. It's worth noting that, since Generation VII, Sheer Cold cannot affect Ice-type Pokémon. As this immunity is not based on type, it cannot be bypassed by things like the Item Ring Target or moves like Gravity and Foresight, unlike the other moves.
/nds fissure, all:
Arbok, Barboach, Bastiodon, Blastoise, Camerupt, Charizard, Copperajah, Cubone, Cufant, Diglett, Diglett-Alola, Dondozo, Donphan, Drilbur, Dugtrio, Dugtrio-Alola, Ekans, Excadrill, Flygon, Garganacl, Gastrodon, Geodude, Golem, Graveler, Groudon, Hippopotas, Hippowdon, Kangaskhan, Landorus, Lapras, Lickilicky, Lickitung, Machamp, Machoke, Machop, Mamoswine, Marowak, Marowak-Alola, Mew, Mudbray, Mudsdale, Munchlax, Nacli, Naclstack, Nidoking, Nidoqueen, Onix, Phanpy, Piloswine, Politoed, Poliwhirl, Poliwrath, Rhydon, Rhyhorn, Rhyperior, Sandshrew, Sandslash, Sealeo, Shellos, Shieldon, Slowbro, Slowking, Slowpoke, Smeargle, Snorlax, Spheal, Steelix, Stunfisk, Stunfisk-Galar, Swinub, Tauros, Ting-Lu, Torkoal, Trapinch, Vibrava, Wailmer, Wailord, Walrein, Whiscash, Wormadam-Sandy
/nds guillotine, all:
Axew, Bisharp, Corphish, Crawdaunt, Durant, Fraxure, Gligar, Gliscor, Haxorus, Kartana, Kingambit, Kingler, Klawf, Krabby, Pawniard, Pinsir, Smeargle, Vikavolt
/nds horn drill, all:
Dewgong, Dragonair, Dragonite, Excadrill, Goldeen, Lapras, Mew, Nidoking, Nidoqueen, Nidoran-M, Nidorina, Nidorino, Omastar, Ponyta, Ponyta-Galar, Rapidash, Rapidash-Galar, Rhydon, Rhyhorn, Rhyperior, Seaking, Seel, Smeargle, Tauros, Tyrantrum, Tyrunt
/nds sheer cold, all:
Abomasnow, Articuno, Beartic, Chien-Pao, Cryogonal, Cubchoo, Dewgong, Glalie, Kyogre, Kyurem, Lapras, Ninetales-Alola, Sealeo, Smeargle, Snover, Spheal, Suicune, Vanillish, Vanillite, Vanilluxe, Vulpix-Alola, Walrein
