In the episode's final minutes, Goku explained to Vegeta ... art from Episode 18, the anime staff at Toei Animation were internally referring to Goku’s new form as Super Saiyan 4 because it ...

While the series it debuted in, Dragon Ball GT, is divisive, Super Saiyan 4 itself is widely loved for its unique aesthetic, and for it having been Goku and ... some beautiful art and music ...

Surprising as it may be, it has been confirmed that Akira Toriyama designed the form and called it 'The Super Saiyan 4 of Daima ' (implying that it was specifically for the anime). This can be ...