Hey slleipnir....I'll try help you out with this.

The following are available here:
Mars
KitKat
Oh Henry!
Pocky (many types of Japanese candy are available here, probably even moreso than in Canada)

We do not have the following (as far as I know):
Coffee Crisp
Mr. Big
Smarties (the chocolate kind)
Aero

Does this person live on Oahu or an outer island? If you are unsure, then tell me the city name. I'll try to help you figure this out.... All this talk of candy is making me hungry!