This is a poem from Zero's POV. This is my take of how Zero thinks of Kirby and himself.
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I am Zero
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While you frolick in the light, you know nothing of my plight
As you run and laugh and play, in the darkness I must stay
Though you can breathe fresh air, I must wallow in despair
As you live your carefree life, I must feel all the strife
Why must I feel all the sorrow, while you can look forward to tomorrow?
Why is it that I can easily cry, yet fate refuses to let me die?
What did I do to deserve this pain, even after I've been slain?
Why is it that I'm cursed to this, why is it that I even exist?
You've killed me twice now, I believe, but I was granted no reprieve
All I wanted was a friend, then you brought me to my end
I know that I am truly cruel, and you are such a little fool
Maybe one day my pain will cease, then I will finally be at peace
But for now, you are happy, you have friends, and you are a hero
While I am darkness
I am nothing
I am Zero
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Wow. That was the saddest thing I've ever written. I actually teared up a little.