I got an idea for anyone who decides to sprite mega aggron. Like other mega forms you use the aggron sprite already used in older games.
You could use aggrons gen 4 or gen 5 sprite (depending on what pose you want the arms)
Then you throw rhyperior into the mix with its really bulky body. Since its mega form is really bulky too, it can serve as sort of an outline.
The tyranitar sprite might work as well.
They might make spriting it alittle easier since it has decent enough porportions compared to mega aggron.
EDIT: Ill look into that line your talking about on goomy after I finish with tyrantrum's basic animation.
You could use aggrons gen 4 or gen 5 sprite (depending on what pose you want the arms)
Then you throw rhyperior into the mix with its really bulky body. Since its mega form is really bulky too, it can serve as sort of an outline.
The tyranitar sprite might work as well.
They might make spriting it alittle easier since it has decent enough porportions compared to mega aggron.
EDIT: Ill look into that line your talking about on goomy after I finish with tyrantrum's basic animation.