Quoted By:
Bulkiest Duck is the best duck.
Eviolite gives it 85/144/152 defences; Trace allows it to screw over Pokémon like Gliscor and Heatran, as well as grab great Abilities like Prankster, Multiscale and Wonder Guard; Download and Analytic boost its already decent 105 base Special Attack, allowing it to function well offensively, too; and its bulk makes it one of the best Trick Room setters available.
Also, nobody ever sees Magic Coat coming.