Hanmuru Doll

The Hanmuru Doll (ハンムルドール) is a large Reaverbot featured in the Mega Man Legends series. They stood well over the size of a small house and can extend its arms to twice its length to slam upon its target.

Mega Man Legends
There are two Hanmuru Dolls in the game. The first Hanmuru Doll is worn-out and had only one arm, and is the first boss from the game, where Mega Man Volnutt must fight against it in the Ocean Tower. Hanmuru Doll walks in Mega Man's direction to attack by extending its arm to twice its length and hit the ground. Mega Man manages to temporarily disable it before he escapes the tower and the Flutter crashlands at Kattelox Island.

Another Hanmuru Doll appears as an enemy in the underground ruin complex of Kattelox Island. Unlike the first boss, it isn't worn-out and has both arms. It can extend its arms to twice its length to hit the ground, and is able to fire off their club arms like rockets.

The Misadventures of Tron Bonne
A Hanmuru Doll is the guardian of one of the first Aurora Stones in the Shala-Kun Ruins and the boss from Mission 3 Level 1. It pursues the Finkel to attack by extending its arms to slam it or by shooting lasers from its eye. When damaged, Hanmuru Doll will temporarily run fast in Finkel's direction while slamming the ground. The Servbots can use the fire traps in the room to harm Hanmuru Doll.

Rockman DASH: 5tsu no Shima no Daibouken!
A Hanmuru Doll is the boss from stage 3-7 in Ilux Island.

Trivia

 * Hanmuru is derived from the word hammer.
 * In Mega Man Gigamix vol. 1, the robot in the asteroid ruins that attacks the exploration robots when they take the Energy Element is based on Hanmuru Doll.