Pet Turtle

The Pet Turtle is a Pet summoned by using Seaweed, which is found in Ivy Chests, which are found in Jungle Shrines in the Underground Jungle.

Trivia

 * The turtle is in fact actually a tortoise (the first has fins where the latter has feet).
 * The turtle flying with a propeller might be a reference to Rainbow Dash's pet tortoise who uses a propeller to fly around.