Shelly is a shell-walker and Saturn's pet.
She is rescued from a fighting arena alongside her friends. She immediately took a liking to Saturn Toad due to her being gentle towards her.
Shelly is quite fast, and capable of leaping. She seems to be able to stretch her neck a small amount in order to bite opponents, similar to real-life snapping turtles. She is also capable of firing a power blast at targets, mainly frost balls. Not only is her shell capable of withstanding powerful attacks, but as it takes damage, it will build up a large amount of energy, and after a few more attacks, will release as a large burst, capable of stunning multiple enemies.
Shelly is seen as calm and collected. She is not prone to attack enemies on the spot but she does if they pose a threat to her or her friends.
Trivia:
Shelly is named after her species.
She was at first mistaken for a turtle.