During the "Arrancar Research Time" Grimmjow appears to have his left arm, even though it was severed and destroyed by Tousen.
Hitsugaya: (About the kid) Wait, Matsumoto. I want to ask him about that Arrancar. We can perform the soul burial afterwards.
Matsumoto: Well, if that's what you want, Captain.
Shouta: You're a Captain?
Hitsugaya: That's right.
Shouta: (Laughs) No way! You're like the same age as me!
Hitsugaya: Actually, let's do the burial after all.
Japanese Title: 悪夢のアランカル！日番谷隊出撃
Romaji Title: Akumu no arankaru! Hitsugaya tai shutsugeki
Kusajishi Yachiru is the one who picked out Hitsugaya's team's modsouls.