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My kids always wanted two player Mario, so the AI made the mod

His kids have always been disappointed that Super Mario Bros. for the NES does not have two player co-op like the 21st century Mario games. Today he got the AI with Opus 5.5 to make a two player simultaneous mod. You can pick Mario, Luigi, Toad or Peach, and it works on a real NES.

How it works

  1. Asks the AI with Opus 5.5 to make a two player mod
  2. The mod uses the mapper for SMB3
  3. It adds simultaneous two player play with Mario, Luigi, Toad or Peach to pick from
  4. It works on a real NES

Why it’s worth knowing

A 40 year old complaint from his kids got fixed in a day. The first Mario game now lets two players run at the same time, on the real hardware.

Where it’s from

Summarized from a public post on bsky.app. See the original ↗

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Every idea is a real post from someone who tried it, summarized in our words, with a link to the original. App names are swapped for plain words.