What happens when a Pokemon with a lower level than an opponent with No Guard uses a OHKO move?

Question

Does it fail or hit?

Answer 1

It fails

Failing and missing are separate categories.

The other one "....but it failed." Is used the the move you used would end up making an illegal check/status on the opponent.

Source

Hope I could help!

Comments

I just tested it and apparently this answer is correct.
https://replay.pokemonshowdown.com/gen9anythinggoes-2504139076

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Love the alt's name.