Nobody. It may come as a surprise to some of you considering it too is a successful platform holder, but Nintendo is way off the scale of business of Microsoft and Sony, corporations that have numerous hugely profitable interests beyond gaming (NOTE: I'm not sucking either's dick here, just stating a fact). Nintendo isn't even the biggest pure entertainment company in gaming. As a business, Nintendo doesn't need the risk and headaches associated with owning and managing those companies in order to have profitable partnerships that produce excellent results for players and shareholders alike. This strange frenzy among some of you guys for an acquisition race runs counter to how Nintendo operates, and indeed how it can operate.