It's more than rivalry. It's more than Ash and Gary from Pokemon.
It's more than Ryu and Ken from
Street Fighter.
It's an aggressive clashing of eternal friends in a
competition which could nearly destroy the world but because of overusing it, the world is now used to get destroyed everytime so it takes less time to get back to
the original form.
Top notch rivalry in brutal ultra deluxe.
Opponent, competitor or such pussy words can't describe the Überness of this new word.