The index I linked to a few posts up includes all 1st, 2nd and 3rd edition monsters, including things from adventures and from Dragon, Dungeon, Polyhedron and Imagine magazines. It's at least 99% complete. And yes, of course a half-fiend vampiric gelatinous gibbering mouther deserves to be included if it has its own stat block!I've seen indices of 2e and 3e monsters, but never a complete one. That would be a very tall order, especially if you include all the monsters from adventures, Dragon and Dungeon magazine, etc. Also, at a certain point, you have to decide how 'complete' you really want to be- do you, for instance, want to include things like a half-fiend vampiric gelatinous gibbering mouther as a separate monster if it appeared in one obscure adventure?