The White Mushroom:
This is the mushroom with the red hat and white robes who is the one that most people will likely encounter first in the game. The only way to defeat them is to use magic, and the mystery is what magic to use and how many times.

How to Defeat it and get Treasure:

You must successfully cast 3 spells that correspond with the mushroom's mood:

Fire: Use when it crosses its arms and looks like it's shivering.
Blizzard: Use when it leans back and fans itself.
Thunder: Use when it has a light over its head.
Cure: Use when it has fallen on the ground.
Aero: Use when it is spinning in place.
Stop: Use when the mushroom has frozen in mid-move.
Gravity: Use when the mushroom is floating in mid-air.

Summon: There is no summon mood for the mushroom. For example, even though Mushu's fire attack is a fire elemental attack, it is pointless to use this on the mushroom when it shivers because you will receive no item for using the fire attack on the mushroom even though it will appear as though you were successful because the mushroom won't disappear. Summon's against mushrooms are a waste of your time.

If you hit the mushroom with 3 spells, but did not receive the special item "Mystery Goo", and received some other random item instead, then it is because those three spells were not all three the same exact spell so the percent-rate was lower.

In the Japanese release version, 3 of the same magic spell on the mushroom gave a 100-percent-rate of dropping a "Mystery Goo". The USA-KH version was tweaked some and the drop rate for "Mystery Goo" is somewhat lower. So. Since the majority of you reading this have the USA version, the best way to get "Mystery Goo" is to cast 3 of the same spell on any mushroom, as that yields the highest drop rate for the Mystery Goo item.

On another note regarding 3 of the same spell castings, if you were to cast 3 fire spells for example, then not only might the mushroom drop a Mystery Goo item, but also a Fire Gem (because you used 3 fire spells) but also a "Fire Arts". The same applies to all the other spells, that 3 Blizzard spells will produce a "Blizzard Arts", and thunder with a gem and arts, but Gravity/Stop/Aero/Cure don't have "Gems" but do drop random items and do have "Arts. All seven spells have "Arts", "Gravity Arts", "Stop Arts", etc.

As far as the "Arts" are concerned, these are useful in that if you collect all 7, and get all max level spells (Firaga, Thundaga, Curaga, etc) you will recieve the Shield of Dreams from Merlin in Traverse Town if you go speak to him.

Mushroom Locations and Moods:

All Mushroom locations usually have Fire/Thunder/Blizzard moods. These are marked with a (*). Extra moods are listed next to the asterisks, such as (*/Cure) denotes a location with Fire, Thunder, Blizzard, and Cure.

Traverse Town Hotel - Red Room - (*)

Wonderland - Lotus Forest - (*)

Deep Jungle - Outside of Tent (*/Cure)

Deep Jungle - Jungle Hideout - (*/Cure) In the main room with the hole in the floor.

Hades Cup - #7 Tier - (No Treasure Dropped)

Atlantica - Undersea Cave - (*/Stop) - Area on the way to Triton's palace,
marked with two tridents pointing into a small cave.

Atlantica - The Shipwreck, Below deck - (*/Stop)

Agrabah - Treasure Room - (*/Gravity) - Cave of Wonders area, with the mountains of gold.

Halloween Town - Graveyard (*/Aero) - This is the first section of the Graveyard just past the gates into it.

End of the World - Room Before Last Rest Save Point (*/Stop/Aero/Gravity/Cure)

Extra Tips:

- There is one mood that really isn't a mood at all. The mushrooms do it just to throw you off. This is when they freeze in place for a second and look around like they are confused. This mood is sometimes followed by the mushroom getting bored and walking around for a few seconds. Just keep them targetted and follow them so they are still in your line of sight.

- Pick one mushroom and stick with him. The mushrooms sometimes spawn close together and area spells sometimes hit another mushroom you don't have targeted.

- Try to get all the "Arts" and "Mystery Goo" you need before you complete the Hollow Bastion. From my own personal experience, it is a lot harded to find White Mushrooms because the percent-rate for the Rare Truffles (another type of mushroom) is much higher after this point in the game.

Black Fungus
This mushroom looks just like the white mushroom except it is wearing dark blue and black robes with a purple hat. However, to kill these you don't need to use magic, but you can if you want. Depending on what part of the game you fight them in, and your character's levels, the only advantage fighting them usually yields is experience points.

How to Defeat it and get Treasure:

Rarely will the Black Fungus drop a Mystery Goo. It is theorized that the percent-rate of the drop-rate is much higher if you use critical hits and combo chains to damage them and critical hits to kill them.
One of the most rare items in the game is one called "Mystery Mold". It is much like "Pretty Stone" that you find in the beginning of the game in a chest. Other than to just have it in your inventory if you are a completeist, they sell for 9999 in Traverse Town's shop. But if you are in dire need of money, don't take this route. You'd be lucky to even ever get a Mystery Goo from a Black Fungus, much less to ever even see a Mystery Mold.

A few tips for easier ways to kill these guys are as follows. Use the Trinity Limit if you have it. This should kill the Black Fungus outright. If you run into them in Halloween Town, use the exploding pumpkins to your advantage. They also kill the Black Fungus in one hit. Use Stop magic, then attack them. Or, if you are low on HP or are just tired of fighting them because of their poisonous attacks, let Donald and Goofy do the work for you.

Mushroom Locations:

Halloween Town - Pumpkin Patch - This is the area with the twirly bridge thing that three little kids walk over. The spawn rate isn`t very high, but the Black Fungus does spawn here.

End of the World - Room Before Last Rest Save Point - Spawns all mushrooms so it drops the chances of getting only Black Fungi. Still fairly quick.

Agrabah - Bazaar - This is the far right and back area accessible only via one route.

Pegasus Cup - #5 Tier - Ah, the annoying battle which makes the speed battle for this cup rather annoying at times.

Hallow Bastion - Dungeon

Rare Truffle:
These guys look just like the others, except they were blue robes and a yellow hat (and are replicas of the Final Fantasy 1 black mage). They jump around the place, and the only way to defeat them is to keep them in the air with air combo attacks or to cast an Aero spell on yourself and keep yourself under them at all times, bouncing them back up into the air.

How to Defeat it and get Treasure:

If it is Mystery Goo, extra items, and experience points you're after, this is the mushroom you want to fight.

Like the White Mushroom, they are however, pretty easy once you know the trick, and that trick is to bounce them up in the air over and over and over again of which there are a few ways.

UpperCut Trick:

- When you come upon a Rare Truffle spawn, you must first lock on to one of the Truffles with lock on, abosultely needed.

- Watch as the Truffle jumps, when it lands, run up to it and smack it once and only once. You notice that when you hit it, it bounces into the air, despite the fact it was on the ground before.

- Anyway, you have just smacked the truffle in the air. What you want to do now is wait a split second then jump after the truffle and attack it in the air before it comes back and hits the ground.

- You need to jump and then tap the attack button once. This will have you attack with an uppercut attack, and not the aerial spin attack, if you have that ability equipped. If you attacked with an aerial spin, it`s because you didn`t jump before hitting the attack button.

Flying Neverland Trick:

Since you can fly here, you can simply fly up and keep smacking Truffles with impunity. Some limitations apply, in that you have a little less control of which way a Truffle will bounce up, and you have to watch out for running into background scenery.

Aero Trick:

This is perhaps the easiest one, cast your version of Aero and run up and touch the Truffle. Into the air it goes. Stand under it, bounce it, recast Aero as needed before it runs out to extend bounce sessions as needed and reap easy rewards.

Ragnarok Trick:

Use in conjunction with the Uppercut Trick, select Raganarok and let it rip on a Truffle. Make sure you pull off the entire combo. Good finisher, lots of hits.

You get treasure based on how many times you hit and bounce a Truffle:

  10 times - 1 Mystery Goo + 1 Elixir
  50 times - 1 Mystery Goo + 1 Elixir + Shiitake Scroll
100 times - 1 Mystery Goo + 1 Last Elixir + Matsutake Scroll

The scrolls items, like the other special items are again, not much worth, the game explanation simply noting that these scrolls show your ability in being a master of bouncing the Truffle 50 or 100 times.
- An interesting extra, the scrolls (Shiitake/Matsutake) are names after actual types of Japanese mushrooms.

Finally, juggling Rare Truffles nets huge amounts of experience. Where N equals the number of times you bounced a mushroom, you gain N(N+1)/2 experience for each juggling sessions. What that means is, for a 100 hit juggle, you will gain 5050 experience! Easily the fastest way to level up in the game should you get ahold of enough Rare Truffles. Combine this with fighting Rare Truffles in the Collesieum (as well as hitting pause right before a battle ends to redo a Rare Truffle battle) and you can make max level in less than an hour or two.

Mushroom Locations:

End of the World - Room Before Last Rest Save Point - Again, the save reload or respawn trick here. Easiest place to fight the Truffles outside of the Collieseum with the Uppercut trick.

Neverland - Deck of Ship - This is the area you fight Captain Hook, tho of course you will not see Truffle`s here the first time you get there. The ship structure makes straight up truffle fighting really not easy, but there is always the option of flying for a real air combo as per the above trick. Spawn rates are seemingly good.

Halloween Town - Area Right Before Boogie`s House - This is the area with the short bridge and the water passage which leads back to the fountain in Guillotine Sqaure. Spawn rates seem very small, but its possible to find Rare Truffles here. Geography can make fighting here easy or hard. Easy because you can trap Truffles in the corners of the sewer area where the spawn. Hard because the camera can go crazy in those areas. Note, if you hit a Truffle onto a slope, and it slides down and you hit it before it hits the water it DOES NOT count as the Truffle touching land and disappearing.

Hercules Cup - #6 Tier - I highly recommend beating the time attack for this cup so you can freely select to battle Truffles here. Of course no dropped items, but practicing here is mad exp and is good for training for the Uppercut Trick.

Hades Cup - #46 Tier - You can fight this one fairly easily without having to do time attacks to get the selectable battle option. But really, if you have the Hades Cup open, the Hercules time attack should be doable.

Monstro - Throat - They appear here, in the area before the Monstro main fight.

Truffle Tips:

This is the Truffle that once you got your jump then attack rythym down (assuming using the Uppercut Trick), you will have the Mystery Goo's rolling in. I was fighting them once and checked how many I had, and my count was at 22! Enough to make enough Attack Point items to max out Sora`s attack level at 100;p During a typical fight don`t expect to get much more than 4-6 Mystery Goo's however, as getting the 100 combo limit takes some time, and you only have enough time to combo two Truffles up to 100 before the others dissappear (this is assuming no mistakes on your part, and not accidently hitting other Truffles as you combo the Truffle you have locked onto..a fairly common occurence. But as with White Mushrooms, centering one mushroom at a time is important for success). Still, it`s much faster than beating up other mushroom Heartlesses.

Third, a note on combo`ing the Truffles. You can bounce them fairly high, but you don`t really want them flying too high, which is what happens when you hit them offscreen (the uppercut attack, especialy with the longer keyblades has an insane vertical attack range from somewhere at Sora`s knees to 2 body lengths above him and can easily hit off screen Truffles). Now, The auto-tracking for attacks (not the camera strangely enough) in game is superb and will often track things way over your head in battle, but its still possible to lose Truffles you bounce too high. So when you combo a Truffle, make sure he is on screen when you hit him. Don`t worry, you will hit a Truffle if you let him drop in altitude before you swing, as Sora`s uppecut hits a larger area than you may think (as written above). Less of a problem if you are flying in Neverland, and less if you are using the Aero trick. Something that will likely happen if you use Ragnarok though.

Last, you may want to pre-kit your character ability-wise for fighting Rare Truffles if you expect an encounter. Namely, un-euipping the Glide party ability helps (Fast Glide is ok, but the normal Glide is bound to the jump button tho). Also, un-equipping the Aerial-Sweep ability from Sora`s list can help as you will want to be hitting with an upper-cut, not an aerial spin anyway. This assuming Uppercut again, for all the other tricks no kitting is really nessecary.

General Hints:
- All of the mushroom Heartless are timed battles. If you take too long they will dissappear. Doesn`t usually happen with Black Fungus, but is something you will happen with White Mushroom hunting a lot.

- White Mushrooms and Rare Truffles will, 100% chance, dissappear without dropped items if you don`t use the proper attacks.

- You may want to summon something when fighting some mushroom (especially White Mushrooms). Reason being, Donald and Goofy will often do a superb job of blocking your view on whats going on, and thus aught to be removed. At decent level, a single summon will last you long enough to take out 1-2 mushrooms. Recommendations go to Mushu (white mushrooms) or Bambi.

- In order to help spawn some mushrooms in the world areas, realize that once you beat completely beat a battle in one small area of the game (i.e. outside the tent area in the Deep Jungle world), a new battle will not respawn until you run 2 areas away from area you want respawned with new monsters. So in the tent area case, running to the first bamboo forest area and back will not respawn the monsters at the tent, but running to the area where you fight Clayton and back will. An easy way to get new monsters. Also an easy way to level up in certain places of the game which allow you to run in circular patterns, thus constantly spawning monsters.
The only area in the game where this works differently is at the the room before the last save at End of The World. This room will ALWAYS spawn new monsters, whether you ran 1 or 2 areas away from it.

- The End of the World room before the last save is most easily taken advantage of spawn-wise for mushrooms by first saving the game at last save. Then run into the room before this. If the desired mushrooms aren`t there, simply reset with the quick reset option. This is NOT the reset button on the PS2, rather push and hold START + SELECT + R1 + R2 + L1 + L2. This will take you straight to the New Game/Load Game screen. For some reason, tho you can use the area respawn trick for this room, reloading over and over again is almost always quicker. I believe there is something in the coding for how the game parcels out mushrooms encounters, in that it gives a higher chance of a mushroom encounter if you have just arrived at the world, and not if you have been actively looking for mushroom encounters.

- Alternately, for Mushroom Spawn points that are close to save points, you can respawn monster areas without fighting by checking out and area, leaving, riding your Gummi Ship then re-entering the world with the spawn point you are trying to hit up for world areas like End of the World, or the Deep Jungle White Mushroom spawn point.

- There is seems to be alot of random chance in finding a mushroom encounter. Knowing this will help you tear out less hair.

- Finally, if you do end up fighting for mushrooms at the End of the World alot. Be aware that mushrooms aren`t the only special items you can collect there. The devil and angel monsters which spawn the most at End of the World will infrequently give out Orichalcum and Mythril in addition to their normally dropped Gale. So doing the normal respawn fighting while looking for mushroom spawns may make sense, if you are keen on maxing out your level/attack/defense/AP parameters, rather than relying on the quicker save/reload trick for mushroom only encounters.