MinatoSparkle
He/Him- 6,003
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So this is pretty simple. Jonin Minato was able to pierce Gyuki's tail with a kunai. It was in partial transformation state, but there's no reason for partial transformation tails to be weaker.
Gyuki's tail also withstood his own Bijuudama
Gyuki's tail also withstood his own Bijuudama