I made a proper local two player mod for Super Mario Odyssey

PimasBump · Thursday at 9:41 PM

This mod lets two people play as Mario on the same screen, with a separate controller for each player. It uses the same method I developed for my own Bowser's Fury local multiplayer mod, which I have not published yet. This is the first of the two that I am releasing publicly.

i-made-a-proper-local-two-player-mod-for-super-mario-odyssey-v0-jm91f74u74eh1.png

It currently provides:

Independent movement and controls for both players
A shared camera that follows the action and zooms out as players separate
Independent damage, death and respawning for each player
Recovery bubbles when someone falls or gets too far behind
Separate costumes and health displays for both players
Correct cap and capture ownership, including protection against both players capturing the same target
Support for tested doors, stage transitions, captures and 2D sections

It is made for Super Mario Odyssey 1.0.0 and is mainly tested on Ryujinx but as I'm planning to play it with my daughter, it's also been tested/played on our switch.

Gameplay video:

Download and source:

https://github.com/Gudui/OdysseyLocalCoop

If you own the game and got a modded switch, feel free to try it out, and please report any bugs found.

Thorhax · 2026-07-24T12:31:05+0100

cearp · 2026-07-24T13:34:57+0100

Any slowdowns at all? and is P2's "hat" on enemies still red? (seemed that way from the video, not sure)
I would have loved this to have been out when I first played the game, thanks for the hard work!

Flame · 2026-07-24T14:00:25+0100

Most people be like: this mod isn't possible

@PimasBump be like: defy the Gods

delson_anr · 2026-07-24T19:50:33+0100

Awesome work!
The doc says about main.npdm to run on atmosphere.
Where i can get details do generate a proper file to test on real console ?

PimasBump · 2026-07-24T22:20:07+0100

cearp said:
Any slowdowns at all? and is P2's "hat" on enemies still red? (seemed that way from the video, not sure)
I would have loved this to have been out when I first played the game, thanks for the hard work!

No - Me and my wife and daughter has not experience any lag due, and this is played on the actual docked switch. The mod do very little impact on the performance of the game, as it is mostly hooks into specific functions to add handling for Player 2, e.g. to be able to enter doors and trigger a scene instead of falling through and dying lol.

Flame said:
Most people be like: this mod isn't possible

@PimasBump be like: defy the Gods

Well this mod is not without due credit to MonsterDruide1 who published a decompiled Super Mario Odyssey that has definitely sped up the progression of this as it made it a hell of a lot easier to hook an extra player in

.
Other mentions as well: https://github.com/Gudui/OdysseyLocalCoop/blob/main/CREDITS.md

When my wife have no more complains, I'll look into the release of the Bowsers Fury full co-op mod as well, and was actually the one has taken my far longest to actually enable a 2nd player as there were not published decompilations to pull from..

Anyway, also toying with this at the moment, but it has a long way to actual be playable.

delson_anr said:
Awesome work!
The doc says about main.npdm to run on atmosphere.
Where i can get details do generate a proper file to test on real console ?

Yeah.. my bad, it is of course needed. I've made a release so it is included- Happy testing, please do report bugs and issues so we can get them fixed

New release: https://github.com/Gudui/OdysseyLocalCoop/releases/tag/v0.1.0-alpha.4
Bugs my wife has complained about: https://github.com/Gudui/OdysseyLocalCoop/blob/main/KNOWN_ISSUES.md

I made a proper local two player mod for Super Mario Odyssey

Member

Well-Known Member

瓜老外

Me > You

Well-Known Member

Member

Similar threads

Popular threads in this forum