Talk:Lord Slug/@comment-31661093-20180519044959/@comment-36191236-20180722110449

Yes it is!! While the movie titles: Lord Slug in English, the original (Japanese) title of this movie is: DBZ: Super Saiyan Goku.

According to Daizenshuu, the timeline of this movie took place between the fight with Frieza and the actual SSJ-transformation. This movie gave a glimpse of the SSJ-power. Goku turned into False Super Saiyan/Pseudo Super Saiyan during the fight with Slug. This form is described as:

A state that Goku transformed into in the movie “Super Saiyan Son Goku”. It’s similar to Super Saiyan in that the entire body is wrapped in an aura, but the hair is not completely golden. Also, his eyes become white, as if he had lost consciousness. It looks as if Goku’s anger at being cornered by his enemy Slug overran and made him like a Super Saiyan.

— “Dragon Ball Daizenshuu 7: Dragon Ball Large Encyclopedia” (p. 134)

Toriyama stated that this form should have been the SSJ-design, but for practical reasons ( they had to color goku's hair black all the time, while with the current SSJ-design, they spared time finishing the manga) they changed it like how we know it nowadays. It also had the effect of making it easy to tell from his appearance that Goku had gotten stronger, so it killed two birds with one stone. — Akira Toriyama, “Dragon Ball Super Exciting Guide: Story Volume” (p. 88)