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Thunder Wool (サンダーウール Sandā Ūru) is Sheep Man's special weapon in Mega Man 10. Mega Man launches a thunder wool-cloud that slowly rises, and a lightning bolt shoots straight down from the cloud. He can fire up to two consecutive shots. The cloud itself does very minimal damage. Pairing two clouds together will increase the lightning strike area and power.

Thunder Wool is Pump Man's primary weakness - a single bolt from this weapon can not only penetrate and dissipate his Water Shield, but can also strike Pump Man in the process. It is also effective against the Weapons Archive when it copies Tornado Man's data, Crab Puncher, and Block Devil.

Damage Data Chart

Known damage values in units for Mega Man 10.

MM10-ThunderWool-Icon Thunder Wool
Boss Damage
Blade Man 1:1
Pump Man 1:5
Commando Man 1:1
Chill Man 1:1
Sheep Man 1:1
Strike Man 1:1
Nitro Man 1:2
Solar Man 1:1
Weapons Archive (Elec Man) 1:1
Weapons Archive (Wood Man) 1:1
Weapons Archive (Gemini Man) 1:1
Weapons Archive (Ring Man) 1:1
Weapons Archive (Napalm Man) 1:1
Weapons Archive (Flame Man) 1:1
Weapons Archive (Slash Man) 1:2
Weapons Archive (Frost Man) 1:1
Weapons Archive (Tornado Man) 1:5
Crab Puncher 1:4
Block Devil 1:3
Wily Machine No. 10: 1st Phase 1:1
Wily Machine No. 10: 2nd Phase 1:1
Wily Capsule 0:0
Enker 0:0
Punk 0:0
Ballade 0:0
  • For Thunder Wool, the first number is contact made with the cloud; the second number is the lightning bolt.

Bosses weak against Thunder Wool


  • The Thunder Wool is considered one of the worst Special Weapons in Mega Man history by some fans. Its high energy cost does not account for the area and power of the cloud and lightning strike.
  • The Thunder Wool has the same color scheme as the Thunder Beam. It is possible that it was done as a throwback to this weapon, as this color scheme has not been used for an electric weapon since the first game.

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