Streaky

Streaky is the pet cat of Linda Danvers, the human guise of Kryptonian and superhero Supergirl. When touching X-Kryptonite, Streaky temporarily gains the same powers as her, making him her sidekick.

Physical appearance
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Personality
He doesn't like dogs and his powers likley make him more confident to pick a fight with Scooby-Doo, but was forced to get along to help Supergirl.

Early life
Streaky found the X-Kryptonite that Supergirl threw out after it failed to work as antidote to the ill effects of Kryptonite.

Scooby-Doo! Team-Up
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Appearances

 * Scooby-Doo! Team-Up
 * #37.