I searched the internet for DSIWare and I found the cave story version in a .nds file.
So I used NSMBE V 5.2 to take a look inside and I found this
And as you can see it looks just like the data folder in the pc version of Cave Story!
Now You Can Play The Ultimate PIZZA Boy Simulator!!!
Download Link ~~~~~~> https://bit.ly/2JmbVDi VERSION 0.2.0
MAKE SURE TO CHECK ALL THE THINGS OUT! EVEN THE DROWNING SPRITES!