The Legend of Zelda: The Minish Cap Glitches

Secret of Illusion
1) Go to the right room of Link's house, where the Blacksmith is.

2) Part of the bottom wall, when hit with your sword, makes the sound that indicates it can be destroyed with a bomb. Put a bomb next to it and let it blow up.

Nothing visible will happen, but the wall will no longer make the destroyable sound. You can now also push the wall, but it doesn't do anything.

Charm of Dye
1) Go into the Cafe Bar, you must have a bottle of Din's/Nayru's/Farore's Charm.

2) Drink the charm. Wait inside the Cafe Bar until it wears off.

Link's tunic will now be orange. Leaving the Cafe Bar or shrinking will revert Link to normal. You can be orange while in Minish form by shrinking before you stop flashing colours.

Translation Blunder
European Version

1) Get Figurine no. 129, Mazaal (Fortress of Winds boss). His description is:

"Found in the Palace of Winds."

He's actually found in the FORTRESS of Winds.

Lilypad Trap
1) Take the lilypad, in the Temple of Droplets, to a room where you have to hold an ice block to hold a switch down.

2) Once that's done, sail on the lilypad to the south shore of the northwestern piece of land. Make sure the lilypad is parked on the south shore, and the wall to the west.

If a bug attacks you and pushes you into the small bit of water on the left side of the wall that the lilypad isn't touching, Link will be trapped and can't move (not even to reboard the lilypad), leaving him vulnerable as prey against the bugs. The only way out of this is to reset. If you've made a lot of progress in the dungeon, you CAN save while Link's trapped in the water, so you don't lose the progress.

Beta Leftover
European Version

1) Get figurine #108, Ice Wizzrobe, and check it's description.

It says to hit them with your Fire Rod, an item not available in the final version of the game.