Rumors of Nintendo exploring smartphone games continue to pile up, but the company is denying the latest. Yesterday, Japanese business daily Nikkei reported that Nintendo would be using smartphones as a platform for releasing videos and minigames to promote its Wii U and 3DS titles. However, the company has since said that it will not be offering games on non-Nintendo hardware. We can confirm that there are no plans to offer minigames on smartphone devices, Nintendo explained in a statement. …