|Episode:||I Saw The Doll! The True Identity of the Poison Gas Killer Corps|
|Season:||Space Sheriff Gavan|
|Voice Actor:||Toku Nishio|
Gas Doubler is the thirteenth Doubler. This monster appeared in episode 26. Its powers include a human disguise, summoning white hallucination gas, a pincer claw staff that can emit explosions, teleportation and a pair of swords.