Robin has 3 cards that all look like base cards.
At first I wondered if they were variants, because they all are numbered 82 and from what I've seen all have the same backs.
Then I found this..
So now I know that the card with Robin swinging is in the HOF Chronicles set. One down.
Next I did some looking around I did find a printing plate with Robin holding his HOF plaque, but it didn't have an image of the back, so I looked though all the printing plates I could find and I found that images of players with holding their plaques or giving a speech or some other induction activity were in the HOF Induction set. So I reasonably deduced that this card was in the HOF Induction set.
That leaves us with one card which I can reasonably say is the actual base card to the base set.
So in summary
I hope this helps clear up any confusion if your collecting Robin or another player with the same problem.