According to the Serebii's Nugget ItemDex entry there are two Nuggets available in Mt. Mortar. One hidden and one visible. I've searched a while, and now I'm asking this question.
Is it possible to find those two Nuggets without Rock Climb?
And also, is it possible to get the Dojo Master's Tyrogue before beating the Elite Four? (I find that question a little obvious, but I still want a confirmed answer)
And just to add onto that (xD) where is Rock Climb obtained? I know it's in Kanto somewhere.
Anyhow, thank you. :)