http://www.nintendoplayer.com/feature/vga/ (http://www.nintendoplayer.com/feature/vga/)
I'm not sure if this article is old (there's no date on it anywhere) so I'll just post this on fighting street in case this is old news. This might be from 2013~2014.
I already thought this whole VAG business was stupid, this article just reinforces it. It's a long piece but reading it will be worth it for those who don't know anything about them beyond their "send game receive grade" process.
Good stuff. It pairs well with Game Rave's exposé (https://youtu.be/1BbHDMXxm04) and follow-up (https://youtu.be/vWWeCteSTgc).