>>44384673>Most signature moves are only signature in their introduced gensMore or less yeah of the ones that have kept their move they are listed as their final evo and this isn't counting signature moves for galar pokemon since they aren't a generation old yet
Pikachu, Alakazam, Exeggutor, Marowak, Blissey,Jynx,Porygon-Z, Mewtwo, Ariados(they lost their first signature move but got a new one), Delibird,Smeargle,Lugia,Hariyama, Lati@s, Kyogre,Groudon,Fug,Jirachi,Deoxys,Vespiquen,All the gen 4 legendaries except Manaphy, Victini, Audino,Klinklang, Bouffalant, ReshZekKyur, Keldeo, Meloetta, Genesect, Vivillon, Eternal Flower Floette,Aegislash ,Hawlucha,Klefki,Trevenant,Gourgeist, X deer, Y bird, Z of no game, 3 worthless gen 6 mythicals. all 3 alola starters, Toucannon,Crabominable,Oricorio,Ribombee,Lycanroc,Toxapex,Lurantis,Tsareena,Comfey, O&P monke duo,Palossand,Pyukumuku, Silvally, Turtonator, Bruxish,Dhelmise,Kommo-o, and the Tapu that all share the same move, Bat, Lion, Necrozma,the alola mythicals, Blacephalon
As seen by this list the vast majority of signature moves are lost and these are the relatively few that kept theirs and even then for the alola mons half aren't even in Galar so that might be why they kept theirs after 1 gen. So if you want to keep your move have it be super specific so it cant be generalized, be a legendary, or just don't get added to the new game.