The developer of Scribblenauts Unlimited has revealed that the Wii U has no system-wide achievement system similar to the Xbox 360 (Achievements) or PlayStation 3 (Trophies).
Whilst there are no Wii U accomplishments that are system wide, developers are more than welcome to enter their own into the games they create which are likely to follow a similar suit which New Super Mario Bros. U and Nintendo Land are doing in which unlocked accomplishments are shared via Miiverse, allowing other users to comment on them.
Are you disappointed that Nintendo is still refusing to implement accomplishments in games?
[Source: Eurogamer]