Why can't I find Nincada in the bug catching contest in HeartGold?

Question

I've been trying to catch a Nincada in the bug catching contest in Heartgold, but it seems they're incredibly rare. On Serebii an Bulbapedia, it says 20% rate for a Nincada. However, they're really hard to bump into. I finally bumped into one today, but it was too low level for me to use. But even then, that's the only Nincada I've ever seen. And no joke, I saw Pinsir and Scyther, who only has 5%, at least 10 times each before meeting just one Nincada. Did I do something wrong? Why is it so damn hard to find a Nincada?

Answer 1

Nincada can only be encountered in the Bug Catching Contest if you already have the National Pokedex. Once you have the National Pokedex, Nincada will only appear on Thursdays and Saturdays, not on Tuesdays.
Source

Comments

I already have national dex, and it's Thursday. Which is why it's so weird that it's not working

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Sometimes the RNG is just like that.

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Given that you find 20 Pokemon that are Scyther, Pinsir, or Nincada, there's a 1/3486784401 chance that none of them are Nincada. sorry.

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The only other thing that I can think of that would be preventing Nincada from being encountered would the in game time being set incorrectly, so it could be the correct day in real time but not in game.

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That could be. I'll check. But as said, I finally encountered one. My rng must have been waaayyy below bad