Undercarriage

An undercarriage is used by all boss cogs. It is the large, metal container that lies below the boss and in between the treads. It can be opened from both sides.

Undercarriage Cogs
Inside the undercarriage, there are several cogs (unknown for CEO). These range from levels one to twelve and can be skelecogs. Cogs will appear to be shrunk when they are inside the undercarriage. They will come outside one by one to attack toons on both sides until all of the cogs or toons are defeated. As they come outside, they will enlarge and take their place in battle.