Here is my guide on how to max out your characters stats using the W-Item duplication glitch. For more info on how stats work you can head here https://finalfantasy.fandom.com/wiki/Final_Fantasy_VII_stats
Music by - Lakey Inspired - Visions/In My Clouds
https://www.youtube.com/channel/UCOmy8wuTpC95lefU5d1dt2Q
I'm sure there a couple different methods to do this but this is how I like to do it.