1-4a is a card series in Bakugan: Mechtanium Surge.
| Number | Image | Card Name | Color | Card Type |
|---|---|---|---|---|
| 1/4a | 
|
Zenthon | Green | Ability Card |
| 2/4a | 
|
Venexus | Blue | Ability Card |
| 3/4a | 
|
Braxion | Red | Ability Card |
| 4/4a | 
|
Deezall | Green | Ability Card |
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1-4a (Mechtogan)
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