The 3DS might be selling fairly well but it seems like it is making Nintendo lose money. In their 2011 fiscal report Nintendo shows that they had net sales of ¥647 billion ($8 billion) which is ¥12.3 billion lower than forecasted. Total loss for the year was ¥37.3 billion or $461.2 million. Just a small hunk of change I guess.
Nintendo hopes during the next fiscal year to stop selling the 3DS at a loss and that new titles like New Super Mario Bros. 2 help sales. The release of the Wii U this year should also be a positive event for them if it is anything like the launch of the original Wii. Nintendo is currently predicting to reach a ¥35 billion profit during this current fiscal year.
People might view this as an ill omen for Nintendo but considering how good they have been doing for the last 5 or so years, I think they are just fine.
If you want a headache or are a mad scientist, check out Nintendo’s official earnings report for every detail you could ever want to know.