The only real flops on the Wii at the moment are Bully, Godfather, Scarface, Tomb Raider Anniversary and Opoona. These are quality titles that failed to generate a healthy profit if any profit at all.
All other games that didn't sell well sold enough to generate a huge profit (Okami for example, sold more than the PS2 version and is still selling) or are not quality titles thus not deserving any sales (Alone in the Dark).