SMB1 Program Code on Paper

[Jorpho]

The question is unclear. How are you expecting "original paper documentation of the original program code, with all the 6502 instructions included" to differ from what is in the game's ROM?

Game Roms don't include game code. What you get in the cart is compiled game data. Not the code syntax.

But the "compiled game data" consists of 6502 instructions. It seems highly unlikely that something as old as SMB was written in some high-level language that was subsequently compiled rather than being written in 6502 assembly directly.

I guess the question is whether there is commented assembly code that the original programmers used to produce the game, equivalent to the disassembled game data that has been commented by amateurs (which is why we know about the Spiny Egg behavior in the first place). I would be surprised if there was such documentation available for any commercially released NES game, let alone one from Nintendo.