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Planet-51-alien-dog

An alien dog is an alien animal in space throughout Planet 51. The alien dogs chase Chuck Baker after he lands onto the Planet. They use toxic to release themselves from traps like the chain and the leash. One dog was fooled by Serbok with the donut causing himself to get angry and start attacking him. The Alien Dog has similarities to the Xenomorph from the Alien Series and the name of the dog is Ripley, as in Sigourney Weaver's Character in The Alien Series.  Their urine is apparently very acidic, as it melts the lampposts.  The acidic bodily fluid is another similarity they share with xenomorphs, only with the latter, it's acidic blood, not urine.

He voice of Frank Welker!

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