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Can You Play "All Night Nippon Super Mario Bros." Online?

Playing All Night Nippon Super Mario Bros. Online

No official online multiplayer exists. All Night Nippon Super Mario Bros. is a 1986 Famicom Disk System ROM hack (promo for a radio show), single-player only.

Why No Native Online

  • Original hardware (FDS) had no networking.
  • ROM hacks lack netcode; adding it requires massive reverse-engineering.
  • Copyright: Nintendo does not authorize distribution or online services for modified ROMs.

Ways to Play “Together” (Workarounds)

MethodHow It WorksProsCons
Local Emulator + Parsec / Steam Remote Play TogetherHost runs emulator (Mesen, FCEUX, RetroArch); streams video/audio; friend gets controller inputTrue co-op feel; low latency on LANHost needs decent upload; only host sees native resolution
RetroArch NetplayBuilt-in deterministic netplay (P2P); both run same core/ROMSync-perfect; no video compressionRequires identical ROM/core/settings; desyncs common
Discord Screen Share + VoiceOne player streams; others watch/commentZero setupNot interactive for viewers
Async Challenge RunsShare save states/speedrun times; compare progressFlexible scheduleNot real-time

Recommended Setup (Parsec)

  1. Host: Install Parsec, RetroArch + Mesen core, All Night Nippon ROM (headerless .nes).
  2. Settings → Input → Port 1 = Host, Port 2 = Guest.
  3. Share Parsec link; friend joins, gets controller.
  4. Enjoy chaotic co-op platforming.

Legal/Safety Note

  • Own the original FDS disk/cart before using ROMs.
  • Download emulators from official sites only.
  • Parsec/RetroArch are safe, open-source/proprietary but reputable.

Official Online Mario Alternatives

  • Super Mario Maker 2 (Switch) – Share/play levels online.
  • Mario Kart 8 Deluxe – Online racing/battle.
  • Super Mario Bros. Wonder – Local/online co-op (4 players).
  • Super Mario Party Jamboree – Online board game.
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