http://forums.spiralknights.com/en/node/1526 <--- Second post tl;dr basically says: Yes, they do every type of damage
In game, hit help -> clockworks <---- Basically implies monsters do no/little normal damage.
Just need to know this so I can effectively decide on what 5* equips to get.
Some attacks are still normal. Robot swipes, Gremlin hammers and Wolver bites all do normal damage. Special attacks like bullets and Skelly swipes are exclusively a specific damage type. Basically normal damage still comes from ordinary attack types that never saw a secondary damage type in T2.