Credit goes to the talented Black-Xuo http://www.furaffinity.net/user/blackxuo/ for the great works!
This is both Age-regression and weight gain.
Poor Giratina. It's adult hood was regressed away into an toddler or infant and Gained a massive amount of weight. TO add insult to injury, (Or a lovely change if you think the latter.) Giratina has been Transgender into a Female.
Tho it does seem that the Giratina doesn't feel too much different other than feeling like a bit more of a baby.
Giratina @ Pokemon
Pokemon @ Game-Freak, Nintendo, Creatures Inc.