Definitely not zero frames. I’m pretty sure it can be beaten by just about any throw in the game, of course that needs testing.
But hey, just to bring life to the topic, I edited the first post with the correct new link to the SRK Wiki page and for fun I’m going to revise my personal tier list again:
S-tier ~ Kula (L+1), EX Kyo, Gato(L+1), Oswald(L+1)
A+ ~ Eiji, Geese, Duck (2P)
A-tier ~Duck, Jyazu, K’(L+1), Kim, Kyo, Maxima, Big
B+ ~ Clark, Ryo, Gai, Jenet, Kensou, Ralf, Shen, Terry, Yuri
B-tier ~ Adelheid (L+1), Ash(L+1), Benimaru(L+1), Duo Lon(L+2), Hotaru, Iori, Mai, Malin(L+1), Mary, Silber, Whip
C+ ~ Elizabeth (L+1), Hayate, King, Ramon, Robert, Shingo (L+1), Tizoc, Tung, Vanessa(L+1)
C-tier ~ Athena (L+1), Kasumi
D+ ~ Momoko
***L+# means the character rises by # rank(s) when made Leader. So Duo Lon made leader would go from B to S. Gato made leader becomes SS.
Explanation of Ranks:
SS–Monstrously powerful and cheesy; have the potential to wipe whole teams out.
S–Overpowered, but can still beaten with a lot of work. Solid characters who have a little added BS or cheesy feature.
A–Very solid characters who lack a little of the extra cheese or BS that S-rank characters have, or characters who may have weaknesses but excel very well in other areas to make up for it.
B–Nearly solid characters who have 1 or 2 glaring flaws that keep them from advancing higher. Middle road for XI.
C-Have several glaring flaws, but a few good points.
D-Have virtually no redeeming qualities, or too many massive flaws to overcome most matchups.