Rumor Guide - Who Designed Super Saiyan 4?

Kanzenshuu provides the back history, context, and facts surrounding Super Saiyan 4's design by Katsuyoshi Nakatsuru (not Akira Toriyama!)

Z (1969) - News - IMDb

Saiyans – Dragon Ball Universe

It's His Time to Shine!”- Anime and Fortnite Fans Super Excited for the Legendary Dragon Ball Character's Skin Set - EssentiallySports

Dragon Ball FighterZ Will Get Gogeta (SS4) This Week

Rumor Guide - Kanzenshuu

Fans Speculate Possible 'Dragon Ball Super' Return With Big Announcement On May 9

How Dragon Ball's Fake Super Saiyan 5 Goku Broke Fans' Hearts

Vegeta

What if Goku went Super Saiyan 4 to fight Jiren? - Quora