DS Download Play: Internet Connection Requirements Clarified

DS Download Play (single-cart multiplayer) does NOT require an internet connection.

• Local Wireless Only: Host DS broadcasts game data directly to client DS units via local Wi-Fi (ad-hoc). Range ~30 ft.
• No Router / No Nintendo WFC: Works anywhere (car, plane, park).
• Host Needs Game Card: Client downloads temporary demo/multiplayer module to RAM (lost on power off).

Contrast

• Nintendo Wi-Fi Connection (WFC): Required internet + router for online multiplayer (Mario Kart DS, Pokémon). Shut down May 2014.
• DSi Shop / 3DS eShop: Required internet (also shut down).

If "DS download and play" refers to downloading DSiWare/3DS games from eShop, then YES, internet is required (but shops are closed).