Not.
Your answer is:
Not.
You see, if there is a major problem with a game like that it would be listed in the ROM browser as "not compatible". I don't think it says that in the ROM browser for Kirby, right? So, it isn't PJ64 after all, is my guess.
Please read the thread called
Sticky: FORUM RULES - READ THIS BEFORE POSTING
It contains lots of info painstakingly assembled by our beloved Smiff Smiffton III. Why he wen't to so much trouble I don't know, but he did and so you really ought to read it.
One critical point for you: there is a forum search feature at the bottom of the main PJ64 forum page. You can search thousands of questions and answers - guess what 99.9999% of the time your question has already been answered!
Another critical point: you need to download the program called GoodN64 abnd run it on your roms. How and where? The info is in the above thread or your PJ64 help.
Have fun!