A block that acts exactly like a coin, but when collected will become the next map 16 tile instead of empty space.
This could be useful in a situation where you don't want the coin to "delete any details", (shown in the gif)
such as coins in front of decoration tiles, like ledges' dirt.
Consider this as an alternative to using sprite coins.
(note: the coin's p-switch is hit state (when it's a brown block) needs to be exanimated)