Hi, I am adding an easier way to unlock fights after winning a previous fight in the next update.
For now, you will need to use the run common event parameter after a battle and exit scene after battle set to true (common events don't run on the colosseum scene). In your common event you would check the previous battle and result using the variables set up in plugin parameters, and then use the plugin command to discover your intended next fight.
For the discover/unlock plugin commands, you should just need to select the troop you want to discover/unlock. If the troop is not showing up at all in the colosseum, it is not discovered. If the troop is showing up but disabled and unselectable, it is not unlocked.
There is documentation on my website for all of my plugins: https://www.caspergaming.com/plugins/cgmz/colosseum/documentation/ but I just added this feature to my website so right now the documentation is just what you see in the plugin manager help section.