Tales of Vespersia, and I mean in both reviews and sales. I'd guess it's reviewed at least a full 10% below Tales of Symphonia on Gamerankings, and will be below Blue Dragon (in Japan) and Lost Odyssey (worldwide) by a signifficant margin in both sales and reviews.
IMO a flop needs a lot of hype to be called a flop. Some games I think will do poorly like Infinite Undiscovery, M.A.G., Fatal Frame IV (well, not really compared to the rest the franchise but compared to other horrors), Red Alert 3, Beyond Good & Evil 2, Prince of Persia, Lips, but they aren't hyped enough to be flops.








