It doesn't copy whether that permanent is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on
The trick is keeping him alive long enough to hit everyone, as we can't pick who to attack at a given time, and to slip him past whatever defenses may come up

Use these protective sleeves on the following games: A Fool's Fortune, Apotheca, Assassincon, Blood Bound, Blue Moon, Century: Spice Road, Citadels (2016 Edition), Compounded, Coup (Brazilian Variant), Dawn Of The Zeds (Third Edition), Dreamwell, Eight Epics, Elder Sign, Fate Of The Elder Gods, Generalship, Goblins Drool Fairies Rule!, Grifters, Hobbit Tales From The Green Dragon Inn, Imperial Harvest , Infiltration, Kashgar: Hndler Der Seidenstrae, Lord Of The Rings: Confrontation, Love Letter Premium, Lucidity: Six-Sided Nightmares, Mansions Of Madness: Second Edition, Moonquake Escape, Mystic Vale, Onitama, Pandante, Pocket Madness , Power Play: Schemes & Skulduggery, Runebound (Third Edition), Sail To India (AEG Edition), Saloon Tycoon, Scot Pilgrim's Precious Little Card Game, Strife: Shadows And Steam, Tower Of London, V-Commandos, War Of The Ring
This companion is even busted in Limited
Reset Stamp, Acro Bike, Heatran GX, Dubwool V & Reshiram & Charizard GX