Sprite fixes

There were 2 folders for shiny backs.
It SHOULD be
XG/sprites/nameofgames/shiny
XG/sprites/nameofgames/back/shiny

There was a 6G/sprites/x-y/shiny/back folder created somewhere along the line, causing a problem when I went to go update the sprites this round, as I knew I updated certain sprites, but they didnt show a change

If a shiny sprite is missing, it defaults to the regular one automatically. Some shinies are hard to tell if they are shiny or not (Like Carracosta or Garchomp for example), so I removed most of the non-shinies in order to show at a glance what we are missing, making it much easier to fill in the holes. 

I'll hold off on fixing the FTP files for these until we're all set merging here.