This is a video mashing up all known and prominent "shop" themes, but then also mashing up the visuals, for example, it starts off with a wii shop segment, but then immediately shows off a prominent NPC from the legend of Zelda as a "shopkeeper", then it transitions into that legend of Zelda game, as if you "exited" the shop popup, but instead of the NPC, you suddenly get a shopkeeper from Pokémon, selling pokeballs, and it just goes on and on from there, I'd guess