Zabimaru's change in appearance was not canon - it was pure filler. The only canon example of a Zanpakuto spirit changing appearance is Zangetsu's form in Shikai and Bankai.
Can a zanpakuto spirit change its apperince like rengis because his was first a baboon with a snake for a tail then it was a baboon like woman and a snake like boy
Zabimaru's change in appearance was not canon - it was pure filler. The only canon example of a Zanpakuto spirit changing appearance is Zangetsu's form in Shikai and Bankai.
Zabimaru's change in appearance was not canon - it was pure filler. The only canon example of a Zanpakuto spirit changing appearance is Zangetsu's form in Shikai and Bankai.