Kotetsu Jeeg (Kotetsushin Jeeg)

Kotetsu Jeeg (鋼鉄ジーグ Kōtetsu Jīgu) is the mecha used during the largest part of the japanese anime "Kotetsushin Jeeg". When the Raikoba has changed into the head part and the Big Shooter has launched the Jeeg Parts, they combine into Jeeg through the "Build up!" process. Jeeg's armor is very durable and can take a lot of punishment before any signs of damage are shown. The mecha has various weapons embedded into the design:

Knuckle Bomber: The standard Rocket Punch featured in virtually any Super Robot anime.
Jeeg Beam: A short beam of concentrated light from Jeeg's "eyes".
Hell Slap: One of Jeeg's hands will become filled with sharp spikes and on the back of the hand a small jet engine will appear, launching the hand forward and delivering a powerful slap.
Jeeg Breaker: Jeeg's chest cavity will open, revealing rows of sharp spikes. Kenji then proceeds to grapple the enemy around the waist and use Jeeg's arms and the chest spikes to crush and break the enemy in two.
Magnet Rope: The green buttons on Jeeg's chest will emit 6 strings of solid light which Kenji can use to capture and bind the enemy.
Spin Storm: Jeeg's ultimate weapon. Emitted from a hole in Jeeg's belly region, a large red/black electromagnetic whirlwind crashes into the targeted enemy, often completely obliterating it.

Jeeg is also equippable with various other parts, such as the Earth Parts, Sky Parts, the Mach Drills, Jeeg Bazooka and a Baruba rider mode in which Jeeg sits on the back of Baruba.