Which episode of The Regular Show is Muscle Man have bigger chest?

The episode you’re probably thinking of is “Power Tower” , where Muscle Man is shown in a bodybuilding context and his transformation/muscular look is highlighted. That’s the clearest match for the “bigger chest” idea from the series’ episode info and clip descriptions.

Why this one

• The episode summary says Muscle Man is training to become stronger.

• A clip description from the same episode says he becomes known as Muscle Man after lifting weights and turning into a bodybuilder.

• If you meant a specific moment where his chest looks unusually big, this is the most likely episode.

Other possible match

• “Gut Model” is another episode tied to Muscle Man’s appearance, but the search results don’t point to it as the bodybuilding/chest-focused one.

• Reddit discussions mention his exaggerated chest, but that’s fan commentary rather than episode proof.

If you want, I can narrow it down further to the exact scene or clip.