|Used by||Marco Rossi|
|Super Level||Level 2|
Allen O'Neil is Marco Rossi's Level 2 Super Move
A large muscular bald man named Allen O'Neil will appeared in the stage and start shoot at Marco with M60 Bravo (Sometimes he will fire at the opponent), each fire cannot kill or damage Marco instead damage or KOing opponent if caught on fire, he will say rudely at Marco or opponent, upon death he always utters "See you in Hell...!"
Allen is a mid-boss from Metal Slug (series) (Sometimes he appeared as boss in Metal Slug 4 & Metal Slug 6)
(WARNING: THOSE QUOTES ARE RUDELEST WORD, DON'T SAY WITH THAT QUOTES)
- "Come on, Boy!"
- "Your Mincemeat!"
- "Go home to your mommy!"
- "See you in Hell...!"
- Allen is the second rudelest character, the first was Trevor Phillips.
- He is the first character who use the word as death sound.
- He is the larger muscular character for size, the other being Prisoner Juggernaut
- He is the second largest character for chest size & muscular, the other being The Heavy.