Final Boss

No working codes and no expired codes are listed. A code that has not been published is not the same thing as a code that expired. The redemption screen itself has not been confirmed, so this site does not invent a button path.

The experience description says you lift a Karen and throw her into the pit. Muscle is the stat tied to lifting Karens faster. No source publishes how many Karens there are or a required order.

No published Muscle number is attached to any named Karen. The description only says lifting weights raises Muscle and lets you lift Karens faster. A missing number is not proof that the game has no gate.

No. The description assigns Speed upgrades to traveling faster. Auras are the purchase described as making weight lifts faster. Muscle itself is what the description ties to lifting Karens faster.

Yes, as a system. On-sale passes expand pet inventory, add equip slots, or hatch 8 pets at once. No individual pet name, bonus, or rarity is published, and the default inventory and equip counts are unknown.

Its badge description is Beat the Final Boss. It does not name the boss, a location, or a Muscle requirement. Beating the Final Boss is also not documented as the same event as defeating every Karen.