Pokeopolis Universe Alteration: The Brothers
Where Jogeir evolves first, into an Espeon, and gradually takes control of the circus and people begin paying him more and more attention, obviously favoring him over Joke. Joke is overcome by jealousy and under the cover of night begins sabotaging the circus, events leading up to a final confrontation between the two where Joke evolves into an Umbreon and attempts to kill Jogeir.
Joke is defeated, either by their father or Jogeir himself, and for his various crimes against the family disowned and expelled from the circus, forbidden from ever setting foot near it again. He wanders aimlessly, gradually being overtaken by crippling guilt but unable to apologize for his misdeeds, and after several years winds up in Pokeopolis...
... To be reunited with Jogeir. Both brothers are overjoyed and ecstatic to see each other again after so long, and once Jogeir takes full control of the circus, they run it side by side, as equals.
SEE I CAN WRITE STUFF WITH HAPPY ENDINGS.