Kinkaku's Jinchūriki Forms

Despite not being a jinchūriki, Kinkaku, like his brother Ginkaku, absorbed a massive amount of chakra from the Nine-Tailed Demon Fox while being trapped in its stomach. Thus, they can have access to powers and abilities similar to that of Naruto Uzumaki.

Six-Tailed Form
While enraged, Kinkaku can access a massive amount of Nine-Tails' chakra, enough to enter a more muscular version of Naruto's four-tailed form, but with six tails. However, unlike Naruto's six-tailed form, it lacks the Nine-Tails' skeleton and Kinkaku seems to retain his consciousness.