Plessie is a friendly dinosaur that debuted in Super Mario 3D World. In the game, it allows the playable characters to ride him through certain levels, similarly to Dorrie in Super Mario 64 and New Super Mario Bros. Plessie's name is a portmanteau of plesiosaurs and Nessie. The former is an extinct group of large marine reptiles that are often confused as dinosaurs, whereas the latter is the nickname given to the Loch Ness Monster. Its design shares some features with the design of Yoshis, such as the bipedal posture with short legs, the white soft tissue that spans the lower part of the body, big oval eyes pointing forward which feature a white sclera, the nostrils being hosted near the top of a round protruding end of the upper part of the muzzle, and a crest on the back of the head, although the shape of the latter is different.

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