Here's a new one, what's up with Psyduck and Golduck's names?
While Psyduck is okayish for a yellow duck with a headache and weak psychic power, in comparison to Golduck it makes no sense. Golduck is a blue kappa-like duck with a psychic-looking jewel on its brow, while Psyduck is the golden-colored duck.
And this isn't a translation mix-up, in Japanese Golduck is still Golduck and Psyduck is Koduck (meaning child-duck). Also, neither of them are psychic types (but learn a tiny amount of psychic attacks)!
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Hey buddy, I'm as confused as you.
According to Bulbapedia the color gold is sometimes associated with the Psychic-type (in Mystery Dungeon the Gummi which Psychic-types like best is the Gold Gummi. Also the Marsh Badge is called the Gold Badge in Japan).