>>36163380There’s three of them, but they are not a trio. Tornadus and Thundurus are a duo, and Landorus is the odd one out.
This is not only true for the pokemon themselves (stats, abilities, movesets,etc), but in their inspiration as well, as there is no third god accompanying the raijin and fujin. Considering this, Tornadus and Thundurus’ therian forms are based on the fenghuang and the dragon, rather than the azure dragon and vermillion bird specifically, since the fenghuang and the dragon are a natural duo representing yin and yang. Therefore, there is no fourth wheel for a theoretical genie to occupy when the third wheel Landorus represents is already thematically shaky.