So, let's get to the nuts and bolts of the financial figures, covering 1st April 2016 to 31st March 2017 - we have a sizeable net income profit of 102,574 million Yen, which amounts to around $920 million / £715 million / €840 million, up 521.5% on the previous year. That may seem extraordinary, but to be clear there are external and one-time factors bloating that figure - Nintendo's share of Pokémon GO's monster profits are a factor, and more tellingly the company's one-off sale of its majority stake in the Seattle Mariners baseball team. So while that profit figure is terrific news for Nintendo its sheer size doesn't reflect the realities of its day-to-day business, even though the company is doing well.
More importantly, perhaps, net sales beat previous estimates, with the Switch credited for its role. Net sales were still down overall, with the 3DS doing reasonably but the Wii U largely flatlining, coming in 3% below the previous year's results.
The core business of making and selling products also brought a better-than-expected operating profit of 29,362 million Yen (it had been previously projected at 20,000 million Yen), which is roughly $264 million / £205 million / €242 million; despite beating Nintendo's own projection this was still down 10.7% on the previous year.
https://www.nintendo.co.jp/ir/pdf/2017/170427e.pdf