Ammo() was a type of collectible item released during the Treehouse of Horror XXV Event. It was used to shoot down the Rigellian UFOs that were seen flying around a Neighbor's Springfield. Ammo could be collected three different ways: it had a small chance of being dropped when tapping on Rigellians or Grem-Aliens, it could be bought in the store, or it had a small chance of being in the Treat Bags. The Ray Gun, even if owned from previous Events, would also spawn 1 Ammo every 8 hours.
Rigellian UFOs had a 25% chance of spawning in Neighbor's town, and it could only be shot down using Ammo.
|Item||Chance of winning|
|Bronze Treat Bag||20%|
|Silver Treat Bag||10%|
|Gold Treat Bag||10%|