Not sure how unpopular of an opinion this is, but...
I just beat N. Tropy(s) in Crash 4, and I've heard that the fight's kinda disappointing, and yeah, I can see why. It's not that bad, but it does feel like there should have been one more phase. But a lot of people I know think that N. Tropy's original fight in Crash 3 was the best. In my opinion, N. Tropy has NEVER had a decent boss fight.
I mean, his fight in Warped is okay-ish. He sends energy orbs with unpredictable patterns and electric fields, but one thing REALLY takes me out of the fight: Dealing damage.
Do you deal damage by sending an attack back at him? No.
Do you deal damage by reaching a certain object that triggers damage? No.
Do you have to go through a gauntlet of attacks while trying to reach him? No.
...He, literally, LETS YOU attack him! He summons platforms for you to jump across and just kneels there to LET YOU attack him! What kind of powerful master of time are you, N. Tropy!?