I am trying to create a map where a mob class is chosen, the player fights, dies and respawns to fight some more as a different class. I dont want him to keep his inventory, and I dont want other players to pick up his items. What can I do to make the dropped items completely dissappear?
Depending on how the died player respawn...
If the player "respawns" at a specific place, you may set
Check the following video Super Craft Bros: Brawl Developer Commentary by SethBling:
Since the information and requirements you provided is limited, I can't comment more.
One way is to make him trigger 2 command blocks - one before the game starts
Another way is to set gamemode to 2, (adventure mode) wHich make it not possible for players to drop anything, break any blocks, but only pvp. But again, its not possible to break any blocks. Hope it helped. :) (command on the command block: