Multiverse Dragons Conquer Planetos

The Targaeryans thought they were the only remaining dragons in Planetos.

Dragons from different worlds started to transmigrate or reincarnate in the planet after the Valyrians Dragon Gods asked for aid to ensure the survival of the mightiest species in the planet


Note continuously adding and removing dragons characters from other worlds. Some are permanent in the story, while others are temporary like a visitor only.
most of these dragons either died or alive from their original worlds
they are also sentient and can speak

Dragons Visiting, Reincarnated or Transmigrated

Warcraft - Malygos and Sindragosa
Fairy Tail - Belserion, Irene Belserion and Selene
Pokemon - Arceus
Digimon - Magnadramon(Gotamon) and Goddramon(Patamon)

The album image is not mine but from a google image search result when looking for Malygos and Sindragosa together