Johnny Yong Boschs Adam Park had the difficult mission to replace Walter Emanuel Jones Zack Taylor in Power Rangers, but the second Black Ranger ended up becoming an iconic character himself. While the first Power Rangers team changed midway through season 2 following the exits of three cast members, the original Red, Yellow, and Black Rangers had all become fan favorites by that point. This is why replacing Jason, Trini, and Zack with new characters was risky.

https://screenrant.com/power-rangers-adam-new-black-ranger-popular-replacement/