Skateboard is a type of sports equipment used primarily for the activity of skateboarding. It usually consists of a specially designed maplewood board combined with a polyurethane coating used for making smoother slides and stronger durability.
Skateboards are used by the turtles in many incarnations through the franchise.
1987 TV series
Cheapskates are motorized skateboards created by Donatello and used by the turtles in many episodes.
First Film Trilogy
In the first movie the turtles are shown using skateboards, when Donatello goes after Michelangelo, who's waiting for the pizza guy, on his skateboard a human hand can be seen instead of a turtle hand.
2003 TV series
In many episodes the turtles are seen skateboarding in the sewers and in the Back to the Sewer opening Michelangelo is the only one using a skateboard.
2012 TV series
In the Nick series each turtle have their own custom skateboard, Michelangelo is the one who uses it the most and even appears with his on the cartoon opening. Raphael's skateboard was destroyed by a mutagen explosion in Slash and Destroy.
In this live-action film Michelangelo has a motorized skateboard