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The Psychic kingdom controlled countless regions, whether claimed peacefully or violently. They had 7 large allies, those allies being the kingdoms of Normal, Water, Electic, Fire, Dark, Grass, and Ice.
All 8 of their kingdoms were the first founded and dubbed the "Eeveelution Kingdoms." These kingdoms form a large square around the other kingdoms, with Normal in the center.
However, there is one kingdom in the Eeveelution square that the Psychic kingdom is enemies with, that being the Fairy kingdom. The Fairy kingdom was less powerful and smaller, but had many more allies and much more aggressive soldiers.
The Psychic kingdom valued order and organization, speaking that if all kingdoms followed the same rules, there would be peace. The Fairy kingdom valued self expression and happiness, feeling that everyone should be allowed to be whoever they wanted to be, even at the risk of chaos.
Both kingdoms were allies with the rest of the Eeveelution square, and often the topic of playful teasing from the other rulers.
It seems as though these kingdoms would be at war for the rest of eternity or until one kingdom is no more, but could that change? Could there one day be peace between both kingdoms? This idea was brought during an Eeveelution meeting at the Normal kingdom.
At this meeting, the son of the Fairy kingdom, Prince Sylveon, noticed the heir of the Psychic kingdom, Prince Espeon.
They began casually chatting, with playful aggression from Sylveon that was met with a reminder of professionalism from Espeon that disguised his enjoyment.
Espeon and Sylveon couldn't possibly change the rivalry of Psychic and Fairy...
... Could they?