Still, that's not original art. It's actually against the rules to do that.
Maybe instead you should try drawing them. They might not look as good, but this site isn't one that promotes recolours or slight modifications. It even says that in the rules:
"It doesn't matter if you've edited it a little bit or made a few alterations, if it's recognizable it's still considered copyrighted and you still need permission." found
[link]I'm just letting you know so you don't get banned. It'd be a good idea to take these pictures down and then start drawing your modified characters.