Improved over Perfect Kirby 3. Except the humor.
Man it's been ages since Pikanjo's released a new one. And although aesthetically it has great improvments, I can't help but feel it lacks the spirit that made Perfect Kirby 2 and 3 fun to watch.
The gags in the spirit of the "Save summa dat for the sequel!" vibe I feel don't work very well in movie format. Maybe on the hellish pits of Gamefaqs forums or something where they're random and text based, but when transferred to visuals they fall rather lackluster 0_o. I understand your philosophy of keeping everything good and PG so everyone can watch it (to get more votes?) but still.
The jokes I did like were in regards to how the Banjo Kazooie games were nothing more than exhasperating fetch quests; in that respect those were OK but like I said, it was done on forums before they hit flash. If I were to add constructive criticism I guess I'd say that you need to make punchier humor rather than jokes where the setups are a mile away in advanced.
So in conclusion, good animation, lacking in sould. Not bad, good luck in the future duders.