Sweet baby jesus, I need to stop googling oddball NES stuff. The vein in my forehead can be seen from space after reading this thread.
AGCI Wally Bear is a proto. I know this because I owned one. If you're going to put it on a best of list, then add every other proto with differences. Only one of those protos had a label, and it was falling off. Mine was blank. If neither had a label, you wouldn't even be considering it. Holy fuck, come on now. The what ifs around Sharedata Chiller are worse. You don't know, period, take it off the list. Again, no label and it wouldn't be in the conversation.
Little Samson and Flintstones 2 are not #2 and #3 because you have OMGRARE bias. 2 decades of circle jerking, the Blockbuster bullshit with Flintstones and pictures like this have influenced the perception of both games incorrectly. The sad part is there's a significant chance some of the winners in that pic posted in this thread. Fml.
It gets worse with games from other regions. As mentioned in this thread, Americans shouldn't really make any determinations of "rare" or "hard to find" when they don't live in those regions. You have tunnel vision that you can't cure.
On top of all this, rarity lists do not matter, period. They are all wrong. All of them. What matter is price. "oh my should I buy this game which is a R5 or this one is the R7 oh ho ho, clearly the R7, excuse me while I drink my lavender rooibos earl grey hyrbid tea with my pinkie extended".
Fuck that. No one is doing that. What they're doing is looking at the price. Game X is $20 over going rate and Game Y is $20 under. You buy the one priced under. X is beat to shit and Y is not. Do you care about condition? Then you go with the Y. Or you buy the game you're actually going to play. Or even want to own the most. The only way rarity should be a consideration is after all other things have been considered and it at that point, the inaccuracy of whatever list you are referencing makes referring to rarity useless.
The ironic thing is, at least as far as licensed goes price-wise, because lol you goobers killed unlicensed collecting, is Little Samson and Flintstones 2 are #2 and #3. Damage's been done, which makes me glad reality mutually-assured-destruction'd the original NA.