Your Giratina/Blastiose's horn doesn't really fit on its head. Your scratches have crappy shading, especially the one with the flames. It seems like the flames don't light up the bottom of the sprite, even though they should. Also, both scratch sprites have a pretty bad outline. They're not straight or curved where they need to be and they're too dark.
Also, the flames on that one scratch seem. . Bad. It's hard to explain, but it just doesn't seem like flames.
However, your Rhydon/Dusknoir is excellently done.