By Sophie Knight and Reiji Murai TOKYO (Reuters) – Nintendo Co Ltd, facing a third year of losses, is getting lots of unsolicited advice on how to squeeze more out of its Mario franchise and revive its fortunes after admitting that its Wii U game console has been a flop. One thing, however, is certain – it will have to burn through a lot of its cash pile in the years it takes to try again with the Wii Us successor. The Nintendo that emerges could well be a more efficient company – better at marketing its beloved characters, but still wedded to its basic strategy of making hardware as the vehicle for software developed in-house. The Kyoto-based company has been slow to move online, falling behind Microsoft Corp and Sony Corp, which will launch a cloud-based streaming service this summer enabling users to play the same game across numerous platforms.