Wild West Boss Chests are Rare Items that can be obtained by defeating the Subject One boss that can appear in the Wild West. They can also be purchased at the Incinerator in the Junkyard. They can drop Gems, a Crate Key, Alien Board, Mini One and Gem Ship. Wild West Boss Chests can be converted at the Main Hub Gumball Machine in Area 51 at a ratio of 1:1 Gum.