Nintendo Wi-Fi Connection was an online gaming service provided by Nintendo that allowed players to connect and play games over the internet. Launched in 2005, it supported various Nintendo DS and Wii titles, enabling players to compete or cooperate with others worldwide. The service offered features like matchmaking, online leaderboards, and downloadable content. However, Nintendo Wi-Fi Connection was discontinued in May 2014, leading to the end of online services for many games that relied on it. Players now use newer services like Nintendo Switch Online for online gaming experiences.