Hiya Gato! I've noticed you GP checking around C&C, and I have some advice for you:
Smogon grammar refers to the Oxford comma as the serial comma, and it's always used. Have a look through the Spelling and Grammar Standards. Most of the studd you need to know is in there (I have it bookmarked).
To avoid confusion, add a key to your GP checks, i.e. Add Remove Comments.
Feel free to VM me if you have any questions, and good luck!