Okay so I have Mog Hunter's Action Name plugin, but during battle it basically shows what action I'm doing twice. How do I disable the default message (in red) from RMMV so it only shows the action name (in blue) enabled by Mog Hunter?
That should be done automatically by the plugin.
If that doesn't happen, especially in such a way, it usually means that you have an incompatibility between two plugins that is messing up your battle system.
Please post a screenshot of your plugin manager, so that we can see which plugins you have installed in which order and look where the cause might be. Also please give a link to the website of the plugin.