Later on we have the "Cheshire Beagle" trick and, of course, the Whirlidog. It'd be fun to work up a cross-section diagram, Baxter Building or MST3K Gamera style, showing where all the devices and mechanisms reside that give Snoopy his powers.
Unless he's actually an amorphous, magical, Shmoo-like creature. He's almost the right color for that!
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