Can You Play as Master Hand in Super Smash Bros. (1P Mode)?

No. Master Hand is a boss character, not playable in any standard 1P mode (Classic, Adventure, All-Star) in any official Super Smash Bros. game.

Why Master Hand Isn't Playable

• Unique Moveset/Physics: Uses boss-exclusive scripts (finger guns, fist slam, grab, laser) with no standard movement, jump, shield, dodge, or ledge-grab mechanics.
• Stage/Camera Design: Boss stages (Final Destination) are built for a 1v1 boss fight, not free-roaming gameplay.
• No Character Slot: The game code assigns no player character slot to Master Hand.

What You Can Do (With Mods/Hacks)

• Training Mode: Set CPU to Master Hand (requires hacks/mods; not in vanilla menu).
• Mods (PC / Wii U / 3DS / Switch via CFW):
  • Project M / Project+ (Brawl mod): Playable Master Hand via CSS expansion.
  • Smash 4 / Ultimate mods (Skyline, ARCode): Character swap codes exist but are notoriously unstable and crash frequently.
• Master Hand Glitch (Melee): Name-entry glitch (Controller 3) lets you control Master Hand in VS Mode—extremely unstable, crashes often.

Official Verdict: Never playable. Mods exist but are buggy. Fight him in Classic Mode as intended.