So, it seems that Nintendo has come out with the official name (in the United States) of the slider pad. They're calling it... the Slider Pad. Well, at least they aren't beating around the bush. So yeah. Not many other details have been released about the add on, but if you want to stay on the lookout for them, now you know the name to look for. Source. I still think that this is a mistake on Nintendo's part, but only time will tell now. The exact release date hasn't been announced, but considering that it is compatible with the RE: Revelations, I wouldn't be surprised if the launches are, at the very least, somewhat near each other.