Deez is one of the NPCs that can spawn by using an Amani Hex Stick on one of the wandering Forest Frog within Zul'Aman. Once spawned, he will walk to the entrance of the instance and cheer you on when you walk by.
See Zul'Aman NPCs.
Patches and hotfixes
Patch 2.3.0 (13-Nov-2007): Added