Simple way, Create a new layer paint it white click Edit>Stroke make sure the settings are 1 pt and the colour is black. Click ok then to get rid of the white use the magic eraser tool and click the white space then merge down (flatten image if you do it last which is what i do)
Can you make me a sig with a Milotic, Breloom and Mewtwo with a triforce on the back and for Milotic can you write wisdome Breloom courage and Mewtwo power?