Blowhard, A.K.A. Experiment 533, is an illegal genetic experiment created by Jumba Jookiba. He is designed to immobilize victims and objects by flying them like kites. His one true place is with Mrs. Hasagawa as one of her "cats". When not residing with her, he probably works at a kite festival, providing winds for kite-flyers. He is voiced by Frank Welker.
He was activated by a watering can. The episode "Mrs. Hasagawa's Cats" also features these experiments: 002 Doubledip: Designed to double-dip, 031 Gotchu: Designed to pinch, 044 Forehead: Designed to sing off-key, 051 Hocker: Designed to spit acid, 077 Zawp: Designed to be lazy, 111 Mulch: Designed to tear up the ground, 134 Shredder: Designed to shred paper, 214 Pix: Designed to take bad pictures, 288 Boomer: Designed to be a boomerang, 358 Manners: Designed to turn people polite, 507 Woody: Designed to eat wood, 521 Wrapper: Designed to wrap up things, and 566 Derrick: Designed to drill holes.
Blowhard is a purple anteater-like experiment with an elephant-like head with a long dark purple-striped trunk, dark purple patches around his eyes, a yellow stomach from his chin down and a yellow-tipped bellows on the back of his head.
Blowhard can use his trunk to blow powerful blasts of wind and immobilize any object or person by flying them like a kite.
- In "Woops", Blowhard erroneously appeared with Gantu's other captive experiments, although he is barely seen behind Felix, but he was captured by Lilo and Stitch.
- Blowhard's pod color is blue.
- Blowhard is described by the experiment computer screen as, "Experiment 533. Primary function: Big blowhard".
- Blowhard is one of the few experiments to not appear in the group photo at the end of Leroy & Stitch.