Dragon ball z kai , Fairy Tail OVA's and Rurouni Kenshin
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They don't own Kenshin, Toei hasn't allowed them to upload Kai and the FT OVA's are unlicensed. They were shipped with manga volumes which means they are nearly impossible to get, so don't expect them
I wonder if they will get streaming rights to Kai when the Toonami run is over
Rurouni Kenshin is not available on Funimation|NOW, but it is currently streaming subbed and dubbed over on Netflix, Crunchyroll, Hulu, Amazon Prime, and go90.