The online mode will be available to download from the Nintendo eShop on April 25. It will be supported with a number of daily and weekly challenges, each with its own leaderboard.
The challenge mode features four different settings, all of which contain unique rules and gameplay styles.
One mode, designed exclusively for the Wii U, sees players use the GamePad to move platforms and destroy obstacles as Rayman and his friends make their way through a course.
The Challenge Mode replaces the previously announced Wii U demo, which was being offered as an apology to Wii U fans after the game was delayed from March until September.
Ubisoft offered an explanation for the Wii U delay, citing the simultaneous multiplatform release as one of the reasons.
However, members of the development team, including creator Michel Ancel, posted a series of pictures protesting the decision to delay the Wii U version of the game.
> Wii U hands-on with third-party titles: ZombiU, Rayman Legends, more
Watch the Rayman Legends E3 demo below: