Hey bro, how's it going?
I've never tested this plugin with VisuMZ's Message Core. I honestly wouldn't know the answer right now. I do my best to ensure the compatibility of my plugins with larger suites like VisuMZ, but it's almost impossible to guarantee complete compatibility.
I can assure you that if you encounter any difficulties, I will do my best to try to resolve or work around any possible problems.
Thank you for your message and interest. If you need anything, just let me know.