[DDRMaster]

Originally Posted by Fat Death Phenomeno

I've got a couple of questions:

1. If a Technician user uses a move that does reduced damage in a Double Battle, does the Technician bonus apply?

http://www.smogon.com/dp/articles/damage_formula

Damage Formula = (((((((Level × 2 ÷ 5) + 2) × BasePower × [Sp]Atk ÷ 50) ÷ [Sp]Def) × Mod1) + 2) ×
CH × Mod2 × R ÷ 100) × STAB × Type1 × Type2 × Mod3

The modifier to reduce the damage from moves like Surf in double battles happens in Mod1 while the variable BasePower stays the same.