As you all do I am sure the first thing I did when I got my guide was to look up what was said about my rarest games.
I didn't find anything on Atlantis 2 for 2600.
Also I have a AGCI version of Wally Bear for NES. The AGCI Wally Bear was mentioned as possibly existing under the AVE description. It has a completely different label and I'd be happy to email you a pic if you need it.
Adam