What this whole wiki is basically about.

Shonen Rivals are characters who serve as a rival and grow a personal rivalry to another hero, often a Shonen Hero as a competitive drive to find a compare and contrast of something equal and different about each other by strengths and weaknesses all while wanting to achieve something identical to one another, but nevertheless grow a sense of mutual respect for their adversaries despite their differences and personal drive to do something better than another or doing something another rival didn't do.