Pablo, the penguin who wanted to move to the Galápagos, actually would have found company along his journey. Twospecies of penguin live along the west coast of the continent, though they don't get to the equator. And when he got to the Galápagos, he would have met up with a third species, now endangered. (A cold ocean current flowing along that coast allows penguins to thrive outside of Antarctica, though they're smaller and less insulated than their Antarctic cousins.)
Donald's canon birthday is June 9th, while this film (and other sources) claim it's "Friday the 13th". If June has a Friday the 13th, June 9th would've been the Monday of the same week. It's not uncommon to put off celebrating your birthday till the end of a week if it falls on a weekday.
José refers to his size-changing spell as "black magic". Looking at the three factors on the trope page makes you wonder if our favorite Brazilian parrot is not as benevolent as he seems.
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