Ugly Scion is Scion's ugly form. He is Scion's weirdest form. Scion has only used this form once, due to how weak and useless it is. The form's powers are an ugliness blast from the cheek, making your opponent very uncomfortable, and the Ugly hat bomb (a bomb of "fart gas" that is a hat).
Ugly Scion was created when Scion got teleported to Ugly Mountain mysteriously. Scion found strange creatures there. Some worked for him, and gave him the ugly form, and some fought him. The creatures could only be hurt by ugly forms, so Scion used his ugly form to defeat them.