Here's a good example, in Quest Suketoudara has some Disco attire so they got rid of it for his PPE artwork to keep it in line with his traditional design. This also means if his 5* and 6* artwork makes an appearance in his spells, they will also have been modified.
In this graphic you cross off any Smash character who's game you have NOT played. In my example there's games I've played but have not completed (like Ocarina/Mother 3), so they don't count.