Otto Bros

The Otto Bros are the brothers similar to Otto, they are the third boss of Episode V. Frozen Storage. While they combine to transform into a red super penguin.

Appearance
They are the same like the boss of Penguin Spin stage, they have a different glass color orb on their chest with different red number (I at left, II at right).

Weapons/Attacks & Abilities

 * Walking: They move on to their own position before they'll do something.
 * Throwing: They throw yellow attack patterns at any direction below before moving again to another position.
 * Spinning: They both poses and spin around to launch yellow attack patterns.
 * Double Sliding: Both penguins breathe and starts to slide around the room where it starts from below wall screen, top wall screen to their position.
 * Invulnerable: If you beat one of the penguin numbers, they will come front and behind walk so they're unable to be destroyed, the player has to kill himself by his own weapon and restart the battle against them.

Trivia

 * They're both created by Dr. Ulrich and has combination system made by the remnants of Kraken.
 * They are the first boss monsters with their combination to be fought in Evil Factory.