Maybe "Sprite" is a compliment. Among the BIBs, I find Sprite to be one of the lightest bags of syrup for hooking up to a soda fountain. Perhaps Wario is trying to say she is skinny. Typing of which, Sprite is one of those with its own fountains that allow a person to mix in half a dozen or more other flavors, including grape, so, yes, grape sprite does exist. Not bad, either. Then again, I'm a sucker for most grape drinks.
Yes, Captain Syrup is definitely one of the best suggestions for top "Nintendo Gal" but she still gets more attention than anyone from Code Name S.T.E.A.M. or the (Advance) Wars series. A lot of underappreciated ladies in the Nintendoverse.