Does anyone know who created this character and if Al Plastino drew his first adventure or not?
The creation question is more complicated than you might think. There was an earlier "Dynamic Man" with a number of similarities who ran in Timely's Mystic Comics #1-4. The bulk of the stories in Mystic #1-3 were produced by the Chesler shop, although there's some question about exactly who produced the first Dynamic Man story. That first story is signed by "Daniel Peters", about whom nothing is known. He may or may not have been an actual person, although Who's Who lists him as an artist with just this one credit. No one has been able to spot the art as being by someone else. The stories in issue #2 and 3 have been tentatively spotted as having pencils by Gus Ricca, but he did not draw #1. The story in #4 was produced by yet another unknown artist and was probably done through Funnies, Inc. but may have been Chesler.
This is all examined in Will Murray's excellent introduction to the new Mystic Comics Masterworks, and you can see much of the source discussion on the Timely-Atlas list archives around early September 2010.
So most likely Chesler just revamped the Dynamic Man concept for his new venture. Who created that revamp? I'm afraid I don't know the answer to that one.
