>>719132523
Or Frontier for that matter. Kouji stops butting heads with everyone within the first 10 episodes, and the only moment he has later is with Takuya around episode 21 when he (rightfully) chastises him for playing around and not taking things seriously now that they've arrived at the Dark Continent, telling him that they will die if they lose.

And in 02, Daisuke is the only one who wants to believe in Ken and he makes efforts to become his friend.

And in Tamers, there isn't really a rivalry between Takato and Ruki to begin with, it doesn't have that dynamic.