Berserk Super Saiyan

Appearance:
As Goku was in his Super Saiyan 2 form prior to being corrupted, the form possesses the same appearance as Super Saiyan 2, but with black electric sparks instead of blue in the anime or yellow in the manga and blanked out eyes. His skin also appears much darker.

Usage and power:
Goku takes on this form during the Prison Planet Saga, after Cunber's ki affects him.

In the manga, Super Saiyan (Berserk) Goku is able to knock down Super Saiyan Blue Vegeta when he is not fighting back. Base Future Trunks is able to just barely block an attack from Goku in this state, and final form Cooler is able to knock him away by attacking him from behind. Cooler is forced to become Golden Cooler in order to defeat Super Saiyan (Berserk) Goku, casually swatting him aside before using his strongest technique against Goku in an attempt to kill him, Goku survives albeit defeated. After being defeated, Goku reverts to normal and notes that he does not remember what happened to him.

In the anime, Super Saiyan (Berserk) Goku beats back base Vegeta, but appears slightly outmatched when battling Super Saiyan Future Trunks (who is handicapped by his ki-sealing handcuffs). Golden Cooler knocks down Super Saiyan (Berserk) Goku with a single punch, which frees him from corruption.

Video Game Appearances:
Super Saiyan (Berserk) appears in Super Dragon Ball Heroes, introduced in the second mission of the Universe Mission series (UM2).
 * Super Dragon Ball Heroes