Most of them are transferrable (Gen 9 legends/mythicals excluded from this list):
Articuno Zapdos Moltres Mewtwo Mew Raikou Entei Suicune Ho-Oh Lugia Regirock Regice Registeel Kyogre Groudon Rayquaza Jirachi Deoxys Uxie Mesprit Azelf Dialga Palkia Giratina Heatran Regigigas Cresselia Phione Manaphy Darkrai Shaymin Arceus Cobalion Terrakion Virizion Tornadus Thundurus Reshiram Zekrom Landorus Kyurem Keldeo Meloetta Diancie Hoopa Volcanion Tapu Koko Tapu Lele Tapu Bulu Tapu Fini Necrozma Magearna Marshadow Zacian Zamazenta Eternatus Kubfu Urshifu Zarude Regieleki Regidrago Glastrier Spectrier Calyrex Enamorus
The only exceptions are a few mythicals, and Gen 6's Aura Trio.
