"We believe Nintendo can create very profitable games based on in-game revenue models with the right development team. Just think of paying 99 cents just to get Mario to jump a little higher."

- Investor Seth Fischer in a letter to Nintendo president Satoru Iwata.The pressure on Nintendo to make mobile games may be heating up. Seth Fischer, who runs a hedge fund that owns shares in Nintendo, has written a letter to the company's president Satoru Iwata urging him to reconsider his commitment to consoles and avoidance of mobile game development.The quote comes from a letter obtained by the Wall Street Journal in which Fischer urges Nintendo to follow in the footsteps ofdeveloper King, which has generated massive free-to-play revenues on mobile.Of course, Fischer is just one investor, but Nintendo has already fielded many calls to move its games to mobile platforms -- which the company is so far flatly refusing to do. Late last month, Iwata confirmed that his company plans to use mobile as a marketing tool for its dedicated consoles, and not to generate revenue for Nintendo.In an investor Q&A following its results, Iwata said that "the key aspect is that Nintendo would like to establish a firm channel on smart devices through which we can connect with consumers. This channel will enable not only us but also third-party publishers to communicate all the fun content on Nintendo platforms to consumers."