I remember a story where Kashiram fought off robbers to protect something Sai Baba gave him. Was it a special bundle of Udi that he was supposed to distribute?

The story you're recalling does involve Kashiram fighting robbers, but the details are slightly different. In the account from Chapter 0, Kashiram was indeed attacked by Bhil robbers and fiercely defended a small bundle he was carrying. However, the bundle did not contain Udi from Sai Baba. It was filled with powdered sugar. Kashiram was carrying this sugar because a different saint, Janakidas Baba, had advised him to feed it to ants. This act was so sacred to him that he fought to protect the sugar, not because it was a direct gift from Sai Baba.