Mario Party 6 Story Mode: Doesn't Exist — Focus on Party Gameplay Instead

No. Mario Party 6 (GameCube, 2004) has no story mode.

What It Has Instead

• Party Mode: 4-player board game (Day/Night cycle changes spaces/events/minigames).
• Solo Mode: Single-player vs. 3 CPU on boards — unlocks rare minigames.
• Minigame Mode: Free play, Tournament, Decathlon, Endurance, Coin, Rare Minigames.
• Mic Mode: Uses GameCube Mic (included) for voice-controlled minigames (unique to MP6).
• Star Bank: Spend Stars to unlock minigames, boards, characters, voices, Mic Mode content.

Series Context

• Mario Party 1–7, 8, 9, 10, Super, Superstars — none have narrative campaigns.
• Mario Party: Island Tour (3DS) — "Bowser's Tower" is a linear gauntlet, not a story.
• Super Mario Party (Switch) — "Partner Party" (2v2 co-op) + "River Survival" (co-op rafting) — closest to structured progression.

Mario Party is a board game. The "story" is the one you create with friends.