Hammer

Hammer is a type of Battle Chip in the Mega Man Battle Network series that generally attacks the panel ahead with a large hammer.

Big Hammer
Big Hammer (ビッグハンマー) is a Battle Chip family from Mega Man Battle Network 4 obtained from Gaia viruses. It summons a Gaia virus in front of the user, which will stay with Iron Body for a brief moment before attacking the panel in front of it.

Break Hammer
Break Hammer (ブレイクハンマー), shortened as Hammer in most English games, is a hammer Battle Chip that appears in the first three Mega Man Battle Network games and Mega Man Battle Chip Challenge. The user attacks the panel in front with a large hammer that can break defenses.

Gaia
Gaia, known as Gaia Hammer (ガイアハンマー) in Japan, is a Battle Chip family from the first Mega Man Battle Network game obtained from Gaia viruses. A hammer hits the panel in front of the user, and a shockwave advances forward from there.

God Hammer
God Hammer (ゴッドハンマー) is a Mega Class Battle Chip from Mega Man Battle Network 4. It is a stronger version of the Big Hammer chips, which summons a Gaia that attacks with a hammer that damages all panels in the field, including the user's, being dangerous if used without Air Shoes. It won't affect floating targets.

Zeus Hammer
Zeus Hammer (ゼウスハンマー) is a Battle Chip from Mega Man Battle Network 3. The user attacks with a hammer that damages all panels, including the user's. It has no effect on floating targets.

Other Hammers
A key item called hammer appears in Mega Man Battle Network 3 and can be found in Undernet 7. It is used to destroy the monoliths in the Secret Area, and is required to reach Serenade.