Coming from the corner of Brawl modifications, a newcomer to Smash. An original character created from the masterminds of Brawl Minus. A concept so broken, it just may work. I hereby present to you:
JIGGTH
Jiggth is a swordfighter with a unique style, with the ability to deal a multitude of hits for a lot of damage. However because of this, she is a glass cannon which can be KO'd really early. Jiggth is by design a high-risk high-reward character, much like the playstyles she was based off of. Jiggth also has amazing hair. Also... oh I give up.
Jiggth is an inside joke in the Brawl Minus community and a combination of Marth and Purin's playstyles. I didn't consider this 4th party because of it's originality it's moreso considered either an OC or Nintendo relevant.
There are however a number of users who want to see Jiggth playable in Brawl Minus.