Cheats for Luigi's Mansion (GAMECUBE)
Beat Boolossus
I would have to say this was one of the harder bosses, but he is quite easy after you have gotten used to him. First what you need to do is wait for him to slow down (when he is bouncing), while your waiting locate the unicorns that are mde form ice on the left and right sides of the battle field. When he slows down suck him up and take him to one of the sides near the unicorn. When he pops use the ice power to freeze the boos, when they are frozen suck them up and Boolossus will get smaller. Repeat this to kill him. Every boo counts as one on your counter.
Hidden Hearts:
If you're running low on lifeforce, get out your vaccuum and start cleaning lamps and vases. Almost every second vase has a heart hidden inside and nearly every lamp or chandelier either yields money or health.
In-game reset:
While playing, hold B + X and press Start.
Rubies & Gold:
Water plants to get hidden rubies or gold in every room with a portrait of a ghost in it
unlimited 50 life hearts.
(You need to have completed the twin's room first) If you are low on health go straight to the twins room and come straight back out and enter the nursery next door.Go straight to the cabbinet by the door and vacum it.A 50 health heart will appear for you can use this cheat as many times as you want.(Does not work on hidden mansion)
Secret Warp Zone:
Running around from one end of the mansion to the other can be a very time consuming task. Thankfully, Nintendo has implemented hidden warps that let you zoom back to the entrance hall.
Gym Room Warp:
In the gym (the room with the weights and treadmills), turn towards the mirror at the back wall. Switch to your Game Boy Horror's first person mode and examine the mirror with A. After a really trippy warp sequence, you will find yourself in the entrance hall of Luigi's Mansion.