Mario Party 5

Mode Unlockables:

Bowser Nightmare - Beat Story Mode on any difficulty.
Intense Difficulty - Beat story mode on hard with any character
Frightmare - Finish the Bowser Nightmare in the story mode.

Super Duel Mode Unlockables:

Hard difficulty in Battle Competition - Win on normal difficulty in the same competition
Hard difficulty in Flag Competition - Win on normal difficulty in the same competition
Hard difficulty in Robo-Rabbit Competiton - Win on normal difficulty in the same competition
Play as Donkey Kong - Beat him on hard difficulty in Battle Competition
DK Body available for purchase - Beat Donkey Kong on hard difficulty in Battle Competition
DK Tires available for purchase - Beat Donkey Kong on hard difficulty in Battle Competition
DK Engine available for purchase - Beat Donkey Kong on hard difficulty in Battle Competition
DK Gun available for purchase - Beat Donkey Kong on hard difficulty in Battle Competition
Flag Competition Available - Win on hard difficulty in Battle Competition
Robo-Rabbit Competition Available - Win on hard difficulty in Flag Competition
Skolar Body available for purchase - Beat all three competitions on all three difficulties
Skolar Engine available for purchase - Beat all three competitions on all three difficulties
Skolar Gun available for purchase - Beat all three competitions on all three difficulties
Skolar Tires available for purchase - Beat all three competitions on all three difficulties
Bowser Punch available for purchase - Purchase every machine part except the Bowser Punch and Bom-omb Wall
Bomb-omb Wall available for purchase - Purchase every machine part except the Bowser Punch and Bom-omb Wall

Unlock Mini-Games While Not Playing:

You can unlock mini games while you are away by playing Party Mode, then switch the player controlled character(s) to a CPU (Computer Controlled Unit). This will allow the game to continue without you playing. Any game the CPU's play will then be able to be played in Mini-Game mode afterwards. Good yeh?

Super Duel Mode - Earn mini-game points

You need mini-game points to buy machine parts for super dual mode. You can earn these points in Party and Mini-Game Mode. Each mini-game you play is worth one coin. You also don't even have to win!

Taunt:

Press the ''L'' button during your opponents turn on the game board to have your character taunt by saying something. Useless but nevertheless its a a hint.