Wii manufacturer Nintendo has said that retail faces the possibility of a second Christmas without enough stock to meet consumer demand.

Senior VP of marketing George Harrison told Reuters that the firm cannot guarantee it won't see the same problems it had with supply last year.

"There is no guarantee that we are not going to have 'out-of-stocks' this holiday season," said Harrison. "If you see one, buy it. Don't assume that you can come back later and find one.

"We're trying to figure out what's the reasonable monthly [production] level, and as we've seen every time we ship product to the market, whether it's on Japan or here in the US or Europe, it sells out in a matter of days."