>>42327556Usually only big boys like box legendaries are unique. Most of the “lesser legendaries” are just super rare, super strong species that most people probably don’t believe exist because they’re so rare. In ORAS, Latias’ Pokédex entry mentions that they live in herds and in most non game media like the anime lots of lesser legendaries have multiples because they’re species rather than individuals. The only legendaries that are 100% confirmed to be unique IIRC are;
Mewtwo (more can be made theoretically but canonically only one has been)
Kyogre
Groudon
Rayquaza
Deoxys (similar situation to Mewtwo)
Uxie
Mesprit
Azelf
Dialga
Palkia
Giratina
Regigigas
Arceus
Reshiram
Zekrom
Kyurem
Xerneas
Yveltal
Zygarde
Tapu Koko
Tapu Lele
Tapu Bulu
Tapu Fini