SP SSJ Kid Goku GRN is a perfect match for his son, SP SSJ2 Youth Gohan RED. Both of them are great Ranged Fighters that rely on using Blast Arts Cards as their main source of Damage, have ways to Buff their Blast Damage, and reduce the cost of Blast Arts Cards. SP SSJ2 Youth Gohan RED’s Unique Ability rewards him for using Blast Arts Cards while SP SSJ Kid Goku GRN benefits from drawing them himself and both of them bring two Blast Arts Cards to the deck, meaning they compliment each other very well.

That being said, he's not as effective as newer Fighters such as SP Gohan GRN and especially SP Goku GRN.

Goku can be run alongside other Goku Fighters like SP Angry Goku BLU or SP SSBSS Goku YEL to form a fully Saiyan-based Son Family Team, letting the Team benefit from both Son Family and Saiyan Z-Abilities.