The Thunderbird appears as a blue bird atop a nest. Yellow thunderbolts are painted on parts of the bird body. When launched, 3 hatching chicks can be seen rotating in the nest.
"A bird in the hand is worth two in an opponent's face, especially if they're electrically charged and ready to attack from any direction!" —Official Description
- When a fighter punches with the Thunderbird, the bird flies away from its nest in the direction of the punch, then returns to it.
- Unlike other Curve-type ARMS, the Thunderbird can arc its trajectory both up and down, as well as left to right.
- A Rush will increase the weight class of the projectiles to Heavy for the duration of the attack.
|Extension speed||Retraction speed||Extension speed||Retraction speed|
|Maximum duration (uncharged)||TBD||TBD||TBD||TBD|
|Maximum duration (charged)||TBD||TBD||TBD||TBD|
|Maximum duration (Rush)||TBD||TBD||TBD||TBD|
|Maximum duration [Outer Curve] (uncharged)||TBD||TBD||TBD||TBD|
|Maximum duration [Outer Curve] (charged)||TBD||TBD||TBD||TBD|
|Maximum duration [Outer Curve] (Rush)||TBD||TBD||TBD||TBD|
|Maximum duration [Inner Curve] (uncharged)||TBD||TBD||TBD||TBD|
|Maximum duration [Inner Curve] (charged)||TBD||TBD||TBD||TBD|
|Maximum duration [Inner Curve] (Rush)||TBD||TBD||TBD||TBD|
Note: ARMS runs at 30 fps when in three or four player split screen, meaning all frame counts are halved.
Note: All frame data shown is tested using Spring Man.
Note: All frame data shown are from punches that do not contact the opponent and are started at the maximum range possible.
Names in other languages
|1.0.0||Added to game.|
|3.1.0||▼ Decreased homing.|
|4.0.0||▼ Max retraction time of charged punch in frames: 39 (straight)/52 (curved) → 41/53
▼ Max extension time of curved charged punch increased from 62 to 64 frames.
- On the return journey from an attack, the mother bird will appear to be watching the nest.