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Oil Drums, also known as Oil Cans, are cylindrical metal drums filled with oil that have the ability to produce Fire creatures or other monsters from themselves. They have appeared throughout the Donkey Kong franchise as recurring, indefatigable obstacles.
Donkey Kong series
Oil Drums first appeared in the Donkey Kong arcade game. Here they are found in several levels and are quite harmless themselves. However when a blue barrel ends up being burned up inside them, they will produce Fire which can harm Mario.
Donkey Kong Country
Oil Drums later appear in Donkey Kong Country. In this game, Oil Drums have two attack patterns. They either expel flames, which can injure Donkey or Diddy, or they will expel enemies (most commonly Slippas). In the level "Oil Drum Alley" Donkey and Diddy must jump from one floating Oil Drum to the next (while they are not spurting fire of course) in order to reach the level's end. Oil Drums that release enemies have a skull and crossbones displayed on it. The ones that release flames have the words "OIL" displayed on them. While any barrel can take out the skull Oil Drums, only TNT Barrels can take out the ones that release fire. There's also an Oil Drum boss named Dumb Drum.
Donkey Kong Land
Oil Drums also appear in Donkey Kong Land. There is no real difference between the Oil Drums of Donkey Kong Country and the ones of Donkey Kong Land.
Donkey Kong Country 2 and Donkey Kong Land 2
Mario vs. Donkey Kong series
Mario vs. Donkey Kong
Mario vs. Donkey Kong 2: March of the Minis
In Mario vs. Donkey Kong 2: March of the Minis, Oil Drums work the same as in the original Donkey Kong, where if Donkey Kong throws a barrel and it lands in an Oil Drum it will create a Fire enemy. They only appear in the final battle against Donkey Kong.
DK: Jungle Climber
Mario Party 10
A single oil drum makes an appearance as a decorative feature in Mario Party 10. One can see it next to a Dice Block Space, located at the right side of the Donkey Kong Board. The oil drum does nothing but stay there and ignite itself, as other oil drums did in the original Donkey Kong Country. Being miniatural just like the other elements of the board, the oil drum does not actually combust fire; instead, it works out small things resembling flames through some mechanism.
Super Mario Odyssey