While Renji’s original Bankai was infamously not that useful ... that became vital in defeating Askin Nakk Le Vaar. The manga didn’t show much of Urahara’s Bankai, but with how much the ...

While Vegeta trained in the Hyperbolic Time Chamber to increase his strength, Renji trained with Ikkaku to learn how to use his Bankai ... as revealed in the manga. Both of them are also seen ...