I've changed the BitmapWrappers to bypass my fixes and use whatever's present in the Gen 6 project. Any further issues with the Pokedex after this, are not on my end (I'm passing the blame, lol)Shiny Pokemon are fixed but mega Pokemon still float for me.
It makes sense that the y positions of your mega sprites will not be the same as their non-mega counterparts, since the actual sprites themselves are different. The gen 6 project takes that into account though, and provides an additional formOffsetY which can be edited through the MultipleForms script.The Pokedex also still crashes but there's a new error: