A reminder to Pokemon fans that N is, infact, a rival character and the main rival of BW.
>first encounter and battle as early as the second town
>has plenty of encounters and battles throughout the game
>challenges you in ideological terms and accepts you as a worthy adversary
>challenges you to a final battle as equals, who obtained their respective legendary pokemon, just after beating the Pokemon League Champion
How is he not considered a rival and yet Bianca is despite her giving up less than half-way throughout the game?