|"A sons of Allen O'Neil. His invulnerable body must be inherited from his father."|
Allen Jr. is the son of Allen O'Neil, and a playable unit in Metal Slug Attack. He was first introduced to the game as a pre-acquisition unit during the Extra Ops titled Boy Memories. As he is no longer available in the Medal/VIP Crank, parts can be bought at the Rare/Extra Shops.
Much like his father, Allen Jr. fires at enemies with his machine gun and uses a combat knife against enemies who get close to him.
Allen Jr. is basically the same as the normal Allen O'Neil in terms of combat, though he is slightly stronger than his sire. He has a much faster stun unlock (requiring only 3 for this), and also revives himself fully with 4 unlocked (up to 200% of his normal health when maxed). While he loses his machine gun upon revival, he uses his special attack as a standard attack, while throwing multiple grenades in rapid succession as his new special attack. This makes Allen Jr. a stun-capable unit that is able to take and deal damage to enemies.
|50||35000||38500||42350||46585||51243||* HP might be increased by skills / items or buffs|
| Strengthen Weapons|
Strengthen all attack power by (20%, +1% each level).
| Iron Body|
HP will increase by (10%, +0.5% each level).
| Total Neutralization Tactics|
The opponent is stunned by a rate of (10%, +0.5% each level) when hit by an attack.
Even if beaten once, gets back to life and turns into 2nd form via HP (100%, +2% each level).
- There is a grammatical error in his infobox, where it states "A sons of Allen O'Neil". The correct description would be "A son of Allen O'Neil."