As we all know, the Alien Rangers were the most hated part of MMPR Season 3 by both the Sentai fans AND Power Rangers fans. Had Ninja Sentai Kakuranger's reputation been completely spoiled by Saban's Alien Rangers?
First of all, as you must know, the henshin from Kakuranger and the morph from the Alien Rangers were VERY different. I personally prefered the Kakuranger henshin anyday, since the Aliens' morph was unoriginal and they each sounded like they had soap in their mouths. Even worst adaptations for Kakuranger included the fact that the Alien Rangers had only a few episodes in, and the storyline was CRAP compared to Kakuranger's.
Some things Saban did keep close to Kakuranger was the fact that Ninjaman was not really a ranger, neither could he henshin/morph. The white female ranger was still the leader of the team, and each of the fighting styles were about the same.
IMO, Saban could've had the American rangers change their costumes. Kimberly or Kat would've become white, and Tommy would become red. One of them would have to leave, however, but I would choose Billy since he's been with the team longest.
Also, Alien Rangers was apart of MMPR. MMPR fanboys will also overrate the Alien Rangers due to the fact that it was still apart of Zordon's era and they had close ties with the American rangers.
Kakuranger still continues to be underrated by the PR fandom, sadly.