Agent 12

Agent #12 was the codename of a man employed by Dr. Phineus Phibes.

Physical appearance
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Personality
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Season one
He was one of the agents too afraid to tell Dr. Phibes they hadn't Dr. Albert Shaggleford found or his formula, leaving it to Agent 3.

He and Agent 11 were on guard duty at the submarine's lower chamber as it was about to Shaggy Rogers drown and Scooby-Doo. When Scooby had taken an invisible Scooby Snack, Shaggy cried to the agents that he had got loose and was armed and dangerous. When they checked on them, Scooby knocked them out by slamming their heads together. (Shags To Riches)

Season two
When Uncle Albert's cover had been blown as Dr. Phibes's loyal scientist, Shaggy Rogers and Scooby-Doo had to rescue him. Dr. Phibes ended up escaping setting a timed detonation for his lair, leaving his operatives behind. Scooby used a special super speed Scooby Snack and rescued everyone. The day may have been saved, but that didn't spare them from the police arriving. (Uncle Albert Alert)

Appearances

 * Shaggy & Scooby-Doo Get A Clue!
 * 101. Shags To Riches