The power to transform oneself into a sphere-like form. Variation of Geometric Physiology.
- Ball Form
- Rolling Attack
- Sphere Form/Mimicry/Transformation
- Spherical Conversion/Transformation
The user can convert themselves into a ball for attack, defense, and/or mobility. The user's skeletal structure is often highly flexible to allow them to do so with ease.
Ultimate Cannonbolt (Ben 10: Ultimate Alien) can roll himself into a spiked ball.
Sonic the Hedgehog (Sonic the Hedgehog)
Miles "Tails" Prower (Sonic the Hedgehog) copied his hero's signature technique
Knuckles the Echidna (Sonic the Hedgehog)
Amy Rose (Sonic the Hedgehog)
Cream the Rabbit (Sonic the Hedgehog)
Shadow the Hedgehog (Sonic the Hedgehog)
Silver the Hedgehog (Sonic the Hedgehog)
Vector the Crocodile (Sonic the Hedgehog)
Metal Sonic (Sonic the Hedgehog)
Scourge the Hedgehog (Archie's Sonic the Hedgehog)
Samus Aran (Metroid) using the Morph Ball.
Isobu (Naruto) rolling around.
Chōji Akimichi (Naruto), using the Akimichi Clan's Expansion Jutsu...
...then using Human Boulder.
Kid Buu (Dragon Ball Z) using his Mystic Ball Attack.
Sly Cooper performing a rolling technique.
King Candy (Wreck-it-Ralph) in cybug form can curl up and spin at high speeds.
Rarity (My Little Pony: Friendship is Magic)