U.C.O.s or Unidentified Chicken Objects are bosses that make frequent appearances in Revenge of the Yolk. Their role has since been taken over by Giant Robotic Space Crabs.
Attacks
| Image | Description |
|---|---|
 |
The U.C.O. fires a laser to the left or to the right of the player, to lock them in. |
 |
The U.C.O. fires green lasers at you that travel slowly out of its green laser weapons. |
 |
The U.C.O. shoots eggs from its egg cannons at you three times. Each time, its range widens. |
 |
The U.C.O. shoots purple neutrons from its purple neutron weapons at you two times. |
Types of U.C.O.s
U.C.O. #1
Health:
20000
Weakness:
Neutron Gun, Plasma Rifle, Lightning Fryer, Utensil Poker
Strength:
None
Points: 25000
Attack:
Red Laser (formerly with Green Lasers), Green Lasers, Red Laser (formerly with Green Lasers again)
Reward: 10-15 Coins, Atomic Powerup
Description: This U.C.O. is the first one you get to encounter at the end of the Great Unknown. As it's an early-chapter boss, it's rather simple and has low health. Its attacks consist of using Red Laser (with the Green Laser in older versions), then Green Lasers, then Red Laser (with the Green Laser in older versions) again, and then relocating to a different point onscreen.
Appearance: The main part is a gray saucer with a blue paint job and green lights mounted on its center. Above the saucer part is the cockpit, inside of which a green ordinary Chicken resides to control the saucer. The saucer also has three metal arms attached to it. The two bottom ones have the green laser weapon attached, while the top one has the red laser weapon attached.
In the Easter edition, the cockpit receives a ribbon, while the Christmas edition doesn't change it at all.
U.C.O. #2
Health:
80000
Weakness:
Neutron Gun, Plasma Rifle, Lightning Fryer, Utensil Poker
Strength:
None
Points: 100000
Attack:
Egg Cannon three times in a row (formerly four times)
Reward: 10-15 Coins, Atomic Powerup
Description: This U.C.O. is the second one you get to encounter at the end of the Norma Galactic Arm. It's got four times as much health as the first U.C.O. but its attack pattern is much more simple. Its attacks consist of using Egg Cannon three times in a row (four in older versions), and then relocating to a different point onscreen. Each time it uses that attack, the egg-firing cannons slightly move away to cover a wider range.
Appearance: The main part is a gray saucer with a blue paint job and green lights mounted on its center. Above the saucer part is the cockpit, inside of which a green ordinary Chicken resides to control the saucer. The saucer also has four metal arms attached to it, all of which have the egg firing cannon weapon attached.
In the Easter edition, the cockpit receives a ribbon, while the Christmas edition doesn't change it at all.
U.C.O. #3
Health:
140000
Weakness:
Neutron Gun, Plasma Rifle, Lightning Fryer, Utensil Poker
Strength:
None
Points: 250000
Attack:
Red Laser, Purple Neutrons twice (formerly thrice)
Reward: 10-15 Coins, Atomic Powerup
Description: This U.C.O. is the third one you get to encounter at the end of the Sagittarius Galactic Arm. Its attack pattern is the shortest one out of all of them, which makes this boss harder since you have less time to attack it. Its attacks consist of using Red Laser, then Purple Neutrons two times (three times in older versions), then relocating to a different point onscreen.
Appearance: The main part is a gray saucer with a blue paint job and green lights mounted on its center. Above the saucer part is the cockpit, inside of which a green ordinary Chicken resides to control the saucer. The saucer also has five metal arms attached to it. The top one has the red laser weapon attached, and the other ones have the purple neutron weapon attached.
In the Easter edition, the cockpit receives a ribbon, while the Christmas edition doesn't change it at all.
U.C.O. #4
Health:
180000
Weakness:
Neutron Gun, Plasma Rifle, Lightning Fryer, Utensil Poker
Strength:
None
Points: 500000
Attack:
Red Laser twice, Green Lasers, Egg Cannon four times, all at once
Reward: 10-15 Coins, Atomic Powerup
Description: This U.C.O. is the last one you get to encounter at the end of Meteor Storm. Its attack pattern consists of firing all of its lasers at once, and using Egg Cannon four times, then relocating to a different point onscreen.
Appearance: The main part is a gray saucer with a blue paint job and green lights mounted on its center. Above the saucer part is the cockpit, inside of which a green ordinary Chicken resides to control the saucer. The saucer also has six metal arms attached to it. The top ones have the red laser weapon attached, the middle ones have the green laser weapon attached, and the bottom ones have the egg firing cannon attached.
In the Easter edition, the cockpit receives a ribbon, while the Christmas edition doesn't change it at all.
Flash U.C.O.
Health:
4000 + Chapter * 1000
Weakness:
None
Strength:
None
Points: 9000 + Chapter * 1000
Attack:
Shoot eggs
Reward: 10-12 drumsticks, occasionally Gift
Description: This U.C.O. is exclusive to Revenge of the Yolk Online. It's a reskin of Big Chickens from the flash version of The Next Wave, as this U.C.O. shoots eggs, and drops food upon exploding.
Appearance: The saucer does not have any arms attached. It's gray with a blue paint job and green lights mounted on its center. Above the saucer part is the cockpit, inside of which a green ordinary Chicken resides to control the saucer.
Trivia
- U.C.O.s might have been perhaps damaged the most between the graphics update, as most of their attack patterns were simplified. The first one shot green lasers with red lasers, the second one shot eggs four times instead of three, and the third one shot three purple neutrons instead of two. The fourth U.C.O. is the only one that wasn't changed.
- Their attack patterns were reverted to what they originally were in Universe.
- The Space Crabs can be considered to be the successors of the U.C.O.s, as they both are armed with different weapons every encounter.
- In Revenge of the Yolk, the U.C.O.s had a static image of a chicken controlling it and looking down. In Universe, it had a redesign, looking at the player's spacecraft and showing a shocked expression whenever they take damage.
