Dorrie

Dorrie is a dinosaur that resembles the Loch Ness Monster. Her first game appearnce is Super Mario 64, where you'll find her swimming in the course titled Hazy Maze Cave. This creature is very friendly and will give you a lift if you need her. All you have to do is find her, then jump on her, she will gladdly take you to your destination in the water. Dorrie's next game after Super Mario 64 is Mario Party Advacne, where she is sad that there are no other dinosaurs to be her friend, after she explains it, you'll have to choose the Yoshi as a character, go back to Dorrie, and agree to be her friend.

After these two games, Dorrie appeared in New Super Mario Bros. for the Nintendo DS. She only appeared in World 4, where she helped you get across the poisoned water. She would also help you get to higher places (Which was her main purpose in Mario 64) and if you ground pound her, she will move much more faster than before, and lower her head.

It's unknown wheather or not Dorrie was made to resemble the Dolpin from Super Mario World, but it is a possibility on the account that they do do the same thing.