Thunder is a lightning damage weapon special. It is the second lowest tier of lightning damage specials (2★). Machine-type monsters, with the exception of Epsilon, Vol Opt, and Vol Opt ver. 2, have a chance to be Shocked by lightning damage specials.

Damage

Damage inflicted by Thunder depends on the Player level and Enemy ETH.

Rarity	Special Name	Power
2★	Thunder	(Lv. - 1)/3 +60

Damage = (Power) * (100 - (Enemy ETH)) * 0.01
Shock Chance = (Difficulty Modifier) * (Unit Boost)

Unit Boost is as follows:
- 1.5 if either V501 or V502 are equipped
  - These do not stack with each other
- 1 if neither are equipped
Difficulty Modifier is as follows:
- 6.67% for Normal, Hard, and Very Hard
- 2.5% for Ultimate

List of Thunder weapons

All common weapons can drop with Thunder as a special attack, except for drops in Forest, Cave, Mine, VR Temple, VR Spaceship, Jungle, Mountain and Crater on Normal difficulty. Common weapons dropping with the Thunder special can be tekked up or tekked down one special tier to gain the Storm or Shock special. There are no rare weapons with Thunder as a special attack. Thunder can not be added to ES Weapons as a special.