As the countdown begins for the English version of RMVXA, there are several scripts becoming readily available. I’m not able to thoroughly investigate yet (notwithstanding my scripting abilities, such as they are) so I thought I’d list a few scripts from other people.
I happened across this script, written by Mr. Bubble, completely by accident. As the title suggests, it implements a gender system for Actors and Enemies, using RMVXA’s personalised notetags function.
Here’s the link to the page. It includes examples and instructions.