(Refiles to fix Reuters Instrument Code) By Sam Nussey TOKYO, Feb 4 (Reuters) - Nintendo shares slid 11% on Wednesday as investors fretted about momentum ​for its flagship Switch 2 gaming device. The Kyoto-based gaming company on Tuesday ‌reported robust sales for the Switch 2 during the year-end shopping season, though the system is ‌viewed as lacking high-profile game titles to drive demand. The "Super Mario" maker kept its annual net profit forecast at 350 billion yen ($2.24 billion), lower than a ...