Are these plastic sealed cubes from a real pack?

Recently i've been going through my family member's pokemon cards and pricing them, he has two cubes of pokemon cards, one with a holo jungle set kangaskhan on the front, and one with a holo base set Gyrados on the front. I figured these cards were cubes that he bought from a store, and are proboly a scam, but he insists that he opened up a pokemon card box of some kind and those plastic wrapped cards were in there, and he just never opened them. After searching I can't find any boxes that have plastic wrapped cubes of these particular cards. can anyone tell me if there's any pokemon card boxes that had cards wrapped like this?