Kanzenshuu provides the back history, context, and facts surrounding Goku's supposed usage of Kaiō-Ken X100 in Dragon Ball Z Movie 4 against Slug
Kaio-ken, Dragon Ball Wiki
Rumor Guide - Kanzenshuu
What does the J in SSJ stand for in Dragon Ball? - Quora
Rumor Guide - Goku Uses Kaiō-Ken x100 in DBZ Movie 4
Kanzenshuu - the perfect Dragon Ball database & community!
Did Goku use Kaioken x10 against Frieza before using Kaioken x20 or did he never used 10x and skip to 20x? (Frieza Saga) - Quora
Rumor Guide - Goku Uses Kaiō-Ken x100 in DBZ Movie 4
New Kaio-Ken Goku is confirmed real : r/SHFiguarts
Rumor Guide - Kanzenshuu
Can Goku use Kaioken X100? - Quora
Rumor Guide - Goku Uses Kaiō-Ken x100 in DBZ Movie 4
Every Kaioken Multiplier in Dragon Ball EXPLAINED
