Other mistake: During the Pokérap, when the Poliwrath name is said, the Pokémon shown is actually Poliwag. Also, when the Graveler name is said, the Pokémon shown is actually Geodude.
Other mistake: At the end of the intro, before the logo appears you can see Mojo Jojo's brain. His brain is green and it should be pink.
Other mistake: When Mako Tsunami is eating the fish, it remains intact whilst being eaten. He raises the fish to his mouth and is shown eating, but no bite marks are shown on the fish. (00:04:49)
The Origin of the Silver Surfer: Part 1 - S1-E1
Other mistake: When Galactus is saying "Norrin Radd of Zenn-La," his lips touch together when saying "La." Saying "La" requires touching your tongue to your gums behind your top row of teeth. If you were to touch your lips together while trying to say "La," it would come out as "Mmla" or "Bla."