Scooby-Doo Mystery (SNES)

The SNES Scooby-Doo Mystery is an platforming adventure game based on the popular Hanna-Barbera franchise. You take control of Shaggy and Scooby and help them solve mysteries by finding items and clues.

Not to be confused with the point-and-click Genesis game of the same name.

Nonexistent Item
Dialogue mentions Projection Gear which, based on the text, would have most likely been a clue you had to give to Velma to progress in the first stage (the Red Ryan Pirate Ship).

This second blurb explains how the villain could make himself appear and disappear like a ghost. This was probably scrapped to avoid having to use the same explanation (or make a new one) in every level. As a result, there is no in-game explanation for how the villains are able to teleport.

Other
Appears to be a programmer's in-joke. It contains a mild swear word that would not have been used in the cartoon, and would most likely not have been allowed in a game based on said cartoon.

Removed Bonus Game
Dialogue for banana tallying and a raft. Neither bananas nor a raft exist in the game, suggesting that this was intended for a bonus game in which you'd ride a raft while collecting bananas to earn extra lives.

Unused Password
The ROM data lists the password RHGHRWB alongside the others, but entering it doesn't do anything. It was probably meant for the unimplemented Banana/Raft minigame, as two other passwords allow you to play the minigames that do exist.