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All mini-games
Link to another Nintendo DS in the game in Party mode to unlock all mini-game.
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Control ending screen
Successfully complete Story mode. When the characters appear during the ending sequence, tap them with the stylus to make them jump.
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Make Piranha Plant spit fire in Wiggerlers Garden
If an opponent lands on a Piranha Plant space, rapidly tap the Piranha Plant to make it spit fire. This will not always work, but you are more likely to make it spit fire if you tap it with the stylus.
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Badges
Successfully complete the indicated task to unlock the corresponding badge:
| Mario Master | Successfully complete Story mode with Mario. |
| Mario Party DS Master | Get 50,000 Mario Party points. |
| Toad Master | Successfully complete Story mode with Toad. |
| Waluigi Master | Successfully complete Story mode with Waluigi. |
| Monty Mole Rival | Get 13,000 Mario Party points. |
| Donkey Kong Friend | Get 33,000 Mario Party points. |
| Cheep Cheep Rival | Get 5,000 Mario Party points. |
| Diddy Kong Friend | Get 21,000 Mario Party points. |
| Shy Guy Rival | Get 9,000 Mario Party points. |
| Whomp Rival | Get 11,000 Mario Party points. |
| Bowser Rival | Get 37,000 Mario Party points. |
| Luigi Master | Successfully complete Story mode with Luigi. |
| Bowser Jr. Rival | Get 35,000 Mario Party points. |
| Koopa Friend | Get 23,000 Mario Party points. |
| Dry Bones Rival | Get 29,000 Mario Party points. |
| Daisy Master | Successfully complete Story mode with Daisy. |
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| Boo Rival | Get 7,000 Mario Party points. |
| Scuttlebug Rival | Get 3,000 Mario Party points. |
| Hammer Bro Rival | Get 27,000 Mario Party points. |
| Wario Master | Successfully complete Story mode with Wario. |
| Mario Party DS Beginner | Begin the game. |
| Toadette Friend | Get 19,000 Mario Party points. |
| Goomba Rival | Get 1,000 Mario Party points. |
| Peach Master | Successfully complete Story mode with Peach. |
| Kamek Rival | Get 31,000 Mario Party points. |
| Bob-omb Rival | Get 15,000 Mario Party points. |
| Piranha Plant Rival | Get 25,000 Mario Party points. |
| Wiggler Friend | Get 17,000 Mario Party points. |
| Mario Party DS Star | Get 39,000 Mario Party points. |
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| Yoshi Master | Successfully complete Story mode with Yoshi. |
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Boss trophies
Successfully complete the indicated task to unlock the corresponding trophy at the Gallery menu:
| Dry Bones's Bone | Overcome Dry Bones four times. |
| Magic Switch | Overcome Dry Bones three times. |
| Toadette's Piano | Overcome Hammer Bro two times. |
| Enchanted Bookcase | Overcome Kamek two times. |
| Overcomeen Hammer Bro | Overcome Hammer Bro five times. |
| Kamek's Brown Book | Overcome Kamek three times. |
| Be victorious inner's Ballon | Overcome Piranha Plant two times. |
| Overcomeen Dry Bones | Overcome Dry Bones five times. |
| Delicious Durian | Overcome Dry Bones two times. |
| Bowser's MegaMorph Belt | Overcome Bowser. |
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| Overcomeen Kamek | Overcome Kamek five times. |
| Kamek's Blue Dictionary | Overcome Kamek four times. |
| Overcomeen Piranha Plant | Overcome Piranha Plant four times. |
| Toadette's Timpano | Overcome Hammer Bro three times. |
| Toadette's Chair | Overcome Hammer Bro. |
| Hammer Bro's Hammer | Overcome Hammer Bro four times. |
| Bomb Seed | Overcome Piranha Plant three times. |
| Jagged Leaf | Overcome Piranha Plant. |
| Be victorious inner's Pen | Overcome Kamek. |
| Electromagnetic Generator | Overcome Bowser two times. |
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| Yummy Lychee | Overcome Dry Bones. |
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Control character figures in gallery
Go to 'Gallery', 'Acquireion', then 'Character Figures'. Select a figure to view. Tap the figure with your stylus, and it will jump.
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Completion bonuses
Successfully complete Story mode to unlock the Expert CPU difficulty setting; Triangle Twister Puzzle mode; Sound Test options; and Boss Bash and Realize Scuffle mini-games.
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Easy wins in Track Star mini-game
If you are one of the three versus the single person, use the following trick to win easily. When you are escaping (the left or right arrows), look at the player on the train's face. In the countdown near one, if his of her face is looking left or right, choose the opposite arrow. For example, left face is right arrow and right face is left arrow.
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Rocket Rascals mini-game
Successfully complete Story mode and the Study Fall, Short Fuse, Soccer Survival, Chips and Dips, and Trash Landing mini-games to unlock the Rocket Rascals mini-game.