It could, but then it's no ice cream any more, is it?
I see which game you're referring to, but isn't a ninja more like a dark type? Besides, look at your Pokémon Trivia Award, there are so many dead Sandshrew, I'm sure there must be a couple who decided to continue their life as undead ghost.
To be honest, I'm still kinda terrible at spriting. Recoloring is like the easiest thing to do, Paint.NET (I fell in love with that program <3) can just change all pixels of one color to another color of choice. (And the mushroom and flame come from Parasect and Charmander respectively.)
Almost never? Pretty coincidental you happened to check it within the last hour then. :P But sure, PC it is. Who knows Skype may come in handy later.