Nintendo reports 52 percent increase of first-party 3DS software sales in the U.S.

Nintendo sold 2.1 million first-party Nintendo 3DS software units in the U.S. during the first 18 weeks of 2013, an increase of 52 percent over the same time period last year, Nintendo reports.

Since its launch on April 24, Lego City Undercover: The Chase Begins sold almost 94,000 physical and digital copies. Luigi's Mansion: Dark Moon sold more than 140,000 physical and digital units in April in the U.S.. The game sold more than 530,000 units in the U.S. since its launch on March 24.

New Super Mario Bros. U for the Wii U, which launched in November last year, shifted 770,000 physical and digital units in the U.S. to date.

Nintendo notes that data of physical sales of games in April are sourced from the NPD Group and digital downloads of games data is from Nintendo's internal sales figures.

According to Nintendo's fiscal earnings for year ending March 31, the company sold 13.95 million units of 3DS hardware and 49.61 million units of software worldwide, with sales of 3DS game New Super Mario Bros. 2 reaching 6.42 million units worldwide. To date, sales of 3DS hardware and its software have reached 31.09 million and 95.03 million, respectively.

Nintendo also recorded a 36.4 billion yen operating loss ($366 million) for the fiscal year and Nintendo 3DS worldwide sales were weaker than expected for the same period.

At E3 in June, Nintendo plans to showcase several Wii U titles from Mario Kart, Super Mario Bros., The Legend of Zelda and Super Smash Bros franchises.