Does No Guard increase the accuracy of OHKO moves to 100%?

Question

All the OHKO moves - Fissure / Guiollotine / Sheer Cold / Horn Drill.
The question here is if No Guard boosts the OHKO moves to 100% (no miss) or would they remain the same accuracy at 30%?

Answer 1

Yes, OHKO moves used by Pokemon with No Guard will always hit. To be specific, this works by skipping the accuracy check altogether, not by increasing accuracy to 100%.

...any effects that cause a move to completely ignore the accuracy check (such as the Ability No Guard, or X Accuracy in Generation II or earlier) will allow OHKO moves to always hit.

Source

There are no Pokemon that with No Guard that can (legally) learn OHKO moves.

Comments

so it can work out with a machamp with no guard in a metronome battle? i wanna try a metronome battle with my friends, but i wanna know if that works

Answer 2

Yes it does, but since no Pokemon with No Guard learns any of the OHKO you mentioned, it can only be tested by hacking or Showdown.
Also, OHKO moves are banned by Smogon and cannot be used in STABmons.

Source and source

Comments

I ask this because that think from the stabmons question, I see a Golurk with No Guard and Fissure was a great move.

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Showdown has the OHKO clause.