He's apparently a very cute acrylic charm, but We can't tell for sure because he's so small.
This official Katamari Damacy acrylic charm was designed by Ikuno Ohashi of Fangamer Japan. At about 8 centimeters (3.1 inches) tall, it's larger than actual size!
Acrylic charms include front and back protective films to protect the designs in production; remove before using.
KATAMARI DAMACY™&©BANDAI NAMCO Entertainment Inc.