Applying this patch will make it so that when collecting a Dragon Coin for first time, it displays a specified message, much like the Flowers in Yoshi's Island.
More information in the included "Readme.txt".
This version no longer uses SRAM Expand, but uses one byte of FreeRAM. The option to change it is removed, as it must be the specific address it uses in order to work.
A simple patch to be sure, but it can serve as a more elegant way to introduce players to any changes made to the way Yoshi coins work in a particular hack. Be wary, though - all caveats that apply to a normal message apply here. If a player waits until a tide level to touch his first Yoshi coin, the message will kill the tide just like a message block would.