In Kingdom Hearts III, Boom Hammer is the first Formchange of the Classic Tone Keyblade, associated with Guardian Form. It has a base duration of 30 seconds and a maximum combo length of 5. Its attacks are nearly identical to those of Hyper Hammer, with the only difference being aesthetics and different stats for the third ground combo. Its ground combo has Sora leap forward and slam the hammer into the ground in front of himself, spin it around himself, slam it in front of and behind himself, slide it forward before swinging it upwards, and finishing by enlarging the hammer and slamming it on the ground. The air combo is identical to the ground combo, though the slams are replaced by Sora spinning the hammer vertically. Filling the situation gauge while in Boom Hammer allows Sora to Formchange into Clock Drill.
Boom Hammer uses Proximity-style Magic.
Alongside the abilities from Guardian Form, Boom Hammer also has access to Guardbreaker.
|Keyblade Transformation Attack (キーブレード変形演出中の攻撃
Kīburēdo Henkei Enshū-naka no Kougeki )
|Leaping Downward Swing (跳びこみ振り下ろし
Tobi Komi Furi Oroshi )
|First ground combo. Will be replaced by the "Upward Ground Dash Swing" attack if the target is at mid-long range.|
|Leftward 3-Part Spinning Ground Swing (地上左3転振り
Chijō hidari 3-Ten Furi )
|Second ground combo.|
|Back-and-Forth Downward Ground Swing (地上前後振り下ろし
Chijō Zengo Furi Oroshi )
|Third ground combo.|
|Upward Ground Dash Swing (地上ダッシュ振り上げ
Chijō Dasshu Furiage )
|Fourth ground combo.|
|Slam a giant hammer into the ground. (Ground combo finisher)|
|Vertical 3-Part Spinning Aerial Swing (空中縦3回転振り
Kūchū Tate 3 Kaiten Furi )
|First aerial combo.|
|Leftward 3-Part Spinning Aerial Swing (空中左3回転振り
Kūchū Hidari 3 Kaiten Furi )
|Second aerial combo.|
|Upward Aerial Dash Swing (空中ダッシュ振り上げ
Kūchū Dasshu Furiage )
|Third aerial combo.|
|Smack downward with a giant hammer. (Aerial combo finisher)|
|Swoops down and swings hammer, forming small fissures and launching enemies. Used during a Superjump near the enemy or when above the target.|
Learning Boom Hammer
Kingdom Hearts III
- Classic Tone has Boom Hammer as its first Formchange.