The climactic battle in *Dragon Ball Daima*'s finale pits Gomah against Goku, who unveils a shocking new transformation. Many viewers anticipated an explanation for Super Saiyan 4's absence in *Super*, and the finale attempts to address this.
Episode 19 shows the Z Fighters reverting to their adult forms after Glorio's wish. Vegeta's Super Saiyan 3 assault on Gomah fails, leaving Goku to utilize the power granted by Neva in the previous episode – a transformation he calls "Super Saiyan 4."
In this form, Goku battles Gomah, ultimately using the Kamehameha to breach the Demon Realm and allow Piccolo to incapacitate Gomah. While Majin Kuu delivers the final blow, defeating Gomah and freeing the Demon Realm, the expected explanation for Super Saiyan 4's exclusivity is absent.
Instead, Goku casually mentions gaining the form through post-Buu training, omitting any mind-wipe, leaving *Dragon Ball Daima*'s canonicity ambiguous.
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Is *Dragon Ball Daima* Canon to *Super*?

Super Saiyan 4's introduction raises significant questions about *Daima*'s place in the *Dragon Ball* canon. Its omission during Goku's fight with Beerus in *Super*, especially given the stakes, is perplexing. While forgetting is possible, Vegeta's reaction to Goku surpassing him again seems unlikely.
However, a post-credits scene revealing two more Evil Third Eyes in the Demon Realm offers a potential loophole. A future season might involve these objects falling into the wrong hands, providing a mechanism for Super Saiyan 4's return and subsequent loss by Goku. This remains speculation, but failure to address this could create a significant plot hole.
Ultimately, this is *Dragon Ball Daima*'s explanation for Goku's lack of Super Saiyan 4 in *Super*. For more information, check out the anime's intro song.
*Dragon Ball Daima* is streaming now on Crunchyroll.