You'll need to use your Earthquake and Bulk Up TMs from what I know. But the breeding line to get Rockslide is Male Camerupt + Female Spinda = Male Spinda +Female Machop family = Your Machop.
I want to get Bulk Up, Earthquake, and Rock Slide onto my Machop without using TMs.
Now, I've skimmed through the Ru/Sa Pokémon (and the 1 in Colosseum) and it looks like there is no breeding chain for getting all 3 (no one in the Humanshape group can learn 'em all).
Is there a Fr/Lg chain?
If not, I'll just have to get an extra Earthquake from Colosseum or something.
You'll need to use your Earthquake and Bulk Up TMs from what I know. But the breeding line to get Rockslide is Male Camerupt + Female Spinda = Male Spinda +Female Machop family = Your Machop.
Even with FRLG, the only breeding links into Humanshape are Spinda, Volbeat/Illumise and Cacnea (you may recall that Humanshape was one of the "orphan" groups in GSC, along with Mineral and Indeterminate). None of them learn Earthquake or Bulk Up, so only Rock Slide can be bred into the group from outside. As far as I can tell, none of the Humanshapes learn Bulk Up or Earthquake naturally.
On the bright side, Machop learns both TM moves, so once you have the set on a male, you can keep breeding it among the 'chops, and the Bulk Up/Earthquake double can be bred onto Makuhita.
rinku
The GREEN Pokémon master!
Ah, thanks. I'll keep all this in mind while collecting more TMs, hehe