Dimension X is a sub-toyline of the 2012 Teenage Mutant Ninja Turtles toyline, released during late-2015 and early-2016.

It is losely based on the first part of season 4 in the Nickelodeon series, where the Ninja Turtles, April O'Neil, Casey Jones go on a spaceflight adventure with Fugitoid in his spacecraft. However in the TV series, most of the action in the spacearc doesn't take place in Dimension X.

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