So, this is what happened:
Sent out Zorua, disguised as Pidgey, the last Pokemon in the party, at start of battle.
Opponent's Digglet used 'dig' faster than Zorua, Zorua used Hone claws.
Digglet pops up, 'Dig does not effect Pidgey', and Zorua maintains its Illusion...
Um, since it's just an illusion, shouldn't dig still hit?