<p>As far as I know Ugly Monster has a normal Loot System and not a Cooperative Loot System. According to Tibia Wiki all monsters with normal loot system are affected on Double loot event. Therefore the answer to your question is: Yes. Ugly monster is affected on Double loot event.</p><p>Source:</p><p> <a event.</p><p>Source:</p><p><a rel="nofollow" href="https://tibia.fandom.com/wiki/Double_Loot_Events">https://tibia.fandom.com/wiki/Double_Loot_Events</a></p><p></p>