“Yatterman’s Song” by Saemon Onyakichi
“Yatterman’s Song” by Yuki Nishio
There’s a third cover of the original theme that came between these two, but I can’t find a clip for it. From what I’ve seen of the new show, it’s one of those series that would be much improved if the episodes were in the same style as the openings.
On a related note, the Yatterman ending in Tatsunoko Vs. Capcom is among the highlights of the game:
http://www.youtube.com/watch?v=nm34nvH7OHk
It’s strange, but Yatterman No.2 is consciously excluded from the game: not even a cameo. There’s got to be some kind of reason for that but I don’t really know very much about Yatterman and I can’t tell you why.