Rav Huna breih DeR' Yehoshua was Visited by Rav Pappa by when he appeared to be dying, and Rav Pappa ordered burial shrouds made, and then he survived: Rosh HaShanah 17a
Rava was once serving Rav Pappa, Rav Huna breih deRav Yehoshua, Rav Mari and Rav Pinchas breih deRav Chisda, and only the former two stood up in respect for him, leading him to get upset at the latter two for acting as though they were greater than the former two: Kiddushin 32b
Rav Pappa, Rav Huna breih deRabbi Yehoshua and Rava bar Shemuel sitting at a meal together and discussing who was pure enough to lead for the blessing: Berachot 22b
Rami bar Abba had a legal question, and took it to Rav Pappa who forbade it, and then to Rav Huna beriah deR' Yehoshua, who forbade it as well: Megillah 26b
Rav Kahana asking a question, regarding certain personal legal customs, of the schools of Rav Pappa and of Rav Huna breih deR' Yehoshua: Niddah 12b
Rav Pappa and Rav Huna breih deR' Yehoshua explaining a law when they came from the yeshiva: Eruvin 12a
The Exilarch asked Rav Huna bar Chinina to fix up a shady area in such a way that it would be usable for Shabbat. Rav Huna bar Chinina made arrangements, which Rava took apart, as he felt they were unnecessary. Rav Pappa and Rav Huna breih deRav Yehoshua removed the materials, so that Rav Huna bar Chinina could not re-establish his arrangement, but they then realized on Shabbat that he had been correct. The Exilarch cited a verse regarding Rav Pappa and Rav Huna breih deRav Yehoshua - "They are wise to perform evil, but they don't know how to do good": Eruvin 25b-26a
