Perpetual darkness with Kirby it is!
How to survive...
So, somebody found the light switch of the entire universe... and flipped it. (Even though there was a sign saying DO NOT FLIP THIS SWITCH, but I really can't blame them. Curiosity oh curiosity.) We don't know who, but that's not important.
All light in the entire universe is gone. All light.
(That means no light from stars/glow sticks/microwaves/chemical reactions/magic/love/unicorns or anything else you can come up with.) And it's not likely to come back any time soon. The result: You're basically blind. (As is everyone else, for that matter.) And with no light, plants are having a hard time growing too. (Of course some plants use heat from chemical reactions, which is nice.) Luckily you're not alone. Kirby to the rescue! Kirby? Yes Kirby.
Kirby will be your companion and helper. I sincerely hope you find a way to survive this one...
Note: Light refers to visible light, all other forms of gamma radiation are maintained. (So infra-red, UV, etc. still exist.)