The Goku of "Legend!!!"

Apex of Supreme Saiyan Power: Super Saiyan 4 Goku
Max Level SA Level Rarity Type Cost
150 1/20 LR Super AGL 77
Leader Skill
"Goku's Family" Category Ki +3, HP & ATK +170% and DEF +130%; or Super AGL Type Ki +3 and HP, ATK & DEF +120%
Super Attacks
Meteor Smash (12-17 Ki) Kamehameha (18+ Ki)
Massively raises DEF for 1 turn and causes colossal damage to enemy Massively raises ATK & DEF for 1 turn and causes mega-colossal damage to enemy
Passive Skill: Victory Will Be Mine!
ATK +80%; DEF +20% at start of each turn (up to 80%); plus an additional Ki +2 per Rainbow or AGL Ki Sphere obtained; medium chance of evading enemy's Super Attack and countering with tremendous power
Active Skill: 10x Kamehameha
Massively raises ATK temporarily and causes ultimate damage to enemy; can be activated starting from the 4th turn from start of battle (once only)
Link Skill
Super Saiyan ATK +10%
Saiyan Roar ATK +25%
Prepared for Battle Ki +2
Kamehameha ATK +2500 when Super Attack is launched
GT Ki +2
Fierce Battle ATK +15%
Legendary Power ATK +5000 when Super Attack is launched
Shadow Dragon Saga - Pure Saiyans - Goku's Family - Kamehameha

Here are Goku's stats!!!

Stats Base Max Level (No Potential Unleashed) Max Level (No Dupes) Max Level (Full Dupes)
HP 5572 18388 20388 22988
ATK 5066 16720 18720 21720
DEF 2282 7531 9531 12931

This Goku was released in the game as part of Dokkan's 4 year anniversary! You never see him in this form unless you watch Dragon Ball GT (advice: don't, unless you wanna watch more Dragon Ball). In my opinion though, Super Saiyan 4 is definitely one of Goku's stronger transformations. If you want to see the true power of this LR, watch this video!