Snitchley, Aspect of Greed is a unique Treasure Goblin in Diablo III. He can sometimes be found in Arreat Crater Level 2 in Act III, or in The Ancient Vault.
He is much larger (and tougher) than any average Goblin, but is just as harmless. While he cannot attack directly, and moves slower than normal Goblins, he has a Jailer affix and will summon other demons (mostly Warping Horrors) at his side. However, he cannot escape through a portal like other goblins do, instead retreating within his current zone and summoning more and more minions until he is slain.
A bounty may be offered to kill Snitchley in Act III, in which case the secondary objective is to kill 50 enemies.
Snitchley has the same game model as a Gem Hoarder (except for its size), but used the regular Treasure Goblin model until Patch 2.0.1.