Scribblenauts Unlimited, Wii U – £51.53
Scribblenauts Unlimited, Wii U – £51.53 delivered
Obviously this is pretty expensive, but for some reason this isn’t out in Europe until some time next year, but is already out in Australia. Australia are also a PAL format region, so this will work fine on UK Wii U consoles.
You might get charged VAT and/or import duty too, but this is the best way I can see to get this before Christmas.

I think you can go here: http://store.steampowered.com/?cc=us and it’ll let you buy it, check out, covert it into quids and install it.
Oops, ignore that, that’s for PC