It's unusual for Urahara to accidentally fuck up an experiment... Doesn't mean it never happens. Like now.

When Grimmjow wakes up from his quite short stasis, he feels different... A familiar different though. He can faintly hear the distant sound of the Soul Reapers talking frantically about an error.

He manages to turn his head, letting out a huff. He freezes when he spots himself, it's a sight he never thought he'd see ever again.

It's him, the original him. A panther like Adjuchas.