Is an idea I had a few years ago when I was working with the Project Zelda Engine and I almost thought about using the system for Battle Dungeons.
I almost named it Dungeon Duos but I wasn’t sure about that. These are only Concept logos.
The Main Concept
The concept involves multiple dungeon paths and going through different paths depending on which two characters you are using at that time.
So certain team can only go certain paths in the adventure.