TOKYO—Nintendo Co. said its operating profit nearly doubled in the fiscal first quarter as strong game-software sales more than offset a falloff for its main Switch game console.
During the April-June quarter, Nintendo sold 1.88 million of the handheld-hybrid consoles, down from 1.97 million a year earlier—right after its March 2017 release—when component shortages made it hard to keep up with demand.
Still,...