Ok, I will take a shot at this
If it is an Imposter Ditto :
> As soon as the user comes into battle, it transforms into its
> opponent, copying the opponent's stats exactly, with the exception of
> HP. Imposter copies all stat changes on the target originating from
> moves and Abilities such as Swords Dance and Intimidate, but not from
> items such as Choice Specs. Imposter will not transform the user if
> the opponent is disguised or behind a substitute. Imposter does not
> copy its opponent's IVs, but it does copy all EVs except for HP.
>
> In Double and Triple Battles, Imposter will affect the opponent in the
> position directly opposite it.
Yes, It takes the boost from the thick club
Souce
If the ditto used transform:
A transformed Pokémon retains its original species for determining if
it is boosted by Pokémon-specific stat-enhancing items, with the
exception of Metal Powder and Quick Powder, which use the target's
species.
Yes if the Ditto used Transformed
Hope this Helped
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