More goofs: Team Rocket grunts remain in Mt. Moon even after Giovanni disbands Team Rocket. Did they never get the memo like the one foreigner in Gen II?
Your rival always becomes Champion and rubs it in your face just to lose it to you every time you re-challenge the League. (Programmed script, I know, but still silly.)
How does your rival get past the Snorlax before you wake it up to stay one step ahead of you? What is he, a ninja lurking in your shadow?
Yeah, of course Mew was a last-minute addition and it got marketed as a secret Pokémon once Nintendo learned of it. But there's talk that "Mew" was one of the first trademarks; problem is, I can't find the source, although there's registration/application numbers listed.
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Still is weird for the PokéDex numbers to be switched like that. Whatever the reason, it's probably similar to why it is Victini is #0 of the Unova 'Dex.