Search Snake

Search Snake (サーチスネーク) is Snake Man's special weapon. It releases snake probes that walk through surfaces (except for ceilings). Up to three snakes can be used at the same time.

Capacity
One Search Snake uses half of a weapon energy unit in Mega Man 3 and Mega Man III. With a full weapon energy gauge, it can be used 56 times in Mega Man 3 and 38 times in Mega Man III.

Exploit
In the NES version of Mega Man 3, the player can use Search Snake several times without using energy by switching the weapon after each shot, avoiding a complete energy unit being used by the second Search Snake. This issue was fixed in later releases like Mega Man: The Wily Wars.

Bosses weak against Search Snake

 * Mega Man 3: Gemini Man, Snake Man (2nd Encounter), Doc Robot (Quick Man and Wood Man), Holograph Mega Men, Wily Machine No. 3
 * Mega Man III: Gemini Man
 * Mega Man: The Wily Wars: Mega Water. S
 * Super Adventure Rockman: Needle Man

Bosses immune to Search Snake

 * Mega Man 3: Hard Man, Spark Man, Doc Robot (Metal Man and Bubble Man), Yellow Devil MK-II, Gamma (1st form)
 * Spark Man: Mega Man 3 and Mega Man III
 * Mega Man III: Spark Man, Punk, Wily Machine
 * Mega Man: The Wily Wars: Buster Rod. G, Hyper Storm. H, Wily Machine (form 1 and 2)

Other media
Mega Man obtains the Search Snake in the Mega Man animated series. In the episode Mega X, X obtains this weapon.