1. Tabuu has most of his attacks from Brawl (only a few are missing now as of 7/30/2023).
2. I don't have the original effects from Brawl for his attacks, so I used the effects from an Effect Pack I found on that same site (Link in the Info file or Tabuu). I tried to find the right effects that could take the place of Tabuu's actual attack effects from Brawl.

3. Tabuu is currently AI-only, although I plan to make him "controllable" in some way. (One idea is allowing you to choose his next attack, not sure how to implement player-controlled teleporting yet).
4. There is a "lives" system when fighting Tabuu (if you aren't in Turns or Ratio mode), meaning you get multiple chances to defeat him in a match. This might make the fight against him a bit easy (and his low amount of attacks compounds this), but I wasn't interested in adding yet another generic nigh-unbeatable boss character to the list of Bosses that already exist.

5. There is a stage included with Tabuu. He is meant to be fought on this stage, which is permanently zoomed out (0.5 zoom). When I tested him on normal stages, it didn't work out due to his size; he simply took up to much of the screen (even with 0.5 size.xscale/size.yscale) and his attacks took up most of the screen. The included stage gives you more room to run around and allows you to actually see Tabuu when he is attacking (he teleports just off-screen for most of them). The stage itself is just something simple I tossed together, which consists of three Smash 4 Final Destination platforms placed side-by-side along with a static background from RPG Maker 2003. I apologize for the low-quality stage, I just needed something to act as a filler until I find or make a better stage. It does come with a perfectly looped version of Tabuu's Boss Battle Theme. Do note that Tabuu's attack movements are designed with this permanent x0.5 zoom, so if you want to use your own stage for him, it must also be permanently zoomed out by the same amount and must not change at all. EDIT 7/7/2024: There is another stage included with Tabuu. Use that one instead because it looks much better than mine.

6. As the fight against Tabuu can take a while, its best to fight against him in 1-round battles only for Single/Simul/Tag mode. I set to number of rounds for matches to 1 in options menu to do this (or just exit the battle after someone wins a round).

Update 1 (7/22/2023)

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New Attacks/Mechanics
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1. "Gold Throw" added. Tabuu transforms into a gold symbol that looks like a pair of brackets and moves in a curve to try to grab you. Performs a slam if successful.

2. "Clone Attack" added. Not what it seems, Tabuu teleports somewhere close to you and fires projectiles shaped like himself in random directions. The projectiles don't travel very far before fading out.

3. "Multi-Shot" added. Tabuu teleports a medium distance away from you and starts firing a barrage of weak projectiles, followed by a massive fire orb for big damage.

5. 10 seconds after Tabuu's Super-Armor breaks, if Tabuu is still in a hit state 5 seconds later, he'll take 80% reduced damage until he is out of hit states. Prevents characters from locking Tabuu out of his Super-Armor status with lengthly combos and laying on the damage due to his reduced defense.

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Attack Changes
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*Multi-Strike
-Guard damage slightly reduced.

*Tabuu Fire
-Very slightly increased the distance Tabuu teleports off-screen
-Slightly increased speed Tabuu can move up/down to align the attack with his opponent.
-Distance opponent can be from Tabuu before he will teleport to other side of screen increased.
-Maximum value added for Tabuu's initial Y-Position. Prevents opponents from super-jumping to make Tabuu use the attack at a very high height.

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Sound Changes
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1. Added "Guard Sounds" for all attacks (is actually the "light" version of the usual hitsounds; since Tabuu's attacks deal high damage even when blocked, a true "guard" sound didn't seem right).

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Power (Item) Changes
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1. Reduced healing bonus "Health Recovery" and "Auto-Recovery" get from each Life you are missing (if lives system is active).
2. Added "Evershield" Power, which prevents Guard Damage from Tabuu for just 5 seconds, but will not expire if Tabuu is attacking.
3. Added "Rage" Power, which makes you deal more damage the lower your Life is for 10 seconds. If you are in Simul mode, just applies a static amount regardless of your team's remaining Life.

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Behavior Changes
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1. Tabuu no longer will begin his teleport action or launch an attack if you still are in a hitstate.

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Bug Fixes
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1. Powers could be picked up while being hit.
2. "Auto-Recovery" Power could prevent the "Fake KO" from happening.
3. In Tag mode, re-spawning characters no longer keep their previous amount of Red Life, preventing large amounts of Red Life from being stored and allowing far more Life to be recover than intended.
4. Prevented the Helpers used for some attacks from being stuck in battle should they be affected by certain ReversalDefs.

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Misc Fixes
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1. Corrected information about the "Auto-Heal" power in the Info file; healing is done over 7.5 seconds, not 15.

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Attack Changes
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*Gold Throw
1. Base Damage increased from 350 to 400.

*Multi-Strike
1. No longer attempts this move against players that are high up in the air.

*Tabuu Shot (1st half)
1. Base damage of projectiles increased from 10 to 12.
2. Speed of projectiles slightly increased.
3. Size of projectiles increased by 20%.
4. Projectiles can't be recovered out of anymore.
5. Distance Tabuu teleports away from you at start of attack increased.

*Off-Waves
1. Tabuu no longer stays in the middle of the screen during the attack.
2. Base Damage increased from 400 to 500.

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Difficulty+ Changes
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You can now set the following options to make Tabuu tougher to defeat:

8 = Guard Damage of attacks increased to 75% of hit damage (some attacks receive a lower increase).
16 = Makes Off-Waves unblockable.
32 = Makes Off-Waves a 1 hit KO AND unblockable (This option has no effect if the opponent is in Turns or Ratio mode).
64 = Tabuu only ever teleports once after an attack, meaning non-stop attacking. Will teleport multiple times at the start of a match or if hit while super-armor is broken.
128 = Remove lives system & reduce Tabuu's damage output (and healing effects of Powers) by 50% (Does nothing if the opponent is in Turns or Ratio mode).
256 = Tabuu's attack speed is much faster.

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Behavior Changes
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1. Amount of attacks used before going into "Extended Wait Phase" increased from 4 to 5 on "Normal" difficulty, and from 2 to 4 on "Easy" difficulty.
2. While Super-Armor is broken, being hit into the air but not knocked down will no longer cause Tabuu to teleport. Instead, he'll just fall and return to his idle stance after hitting the ground.

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Power (Item) Changes
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1. "Payback" Power damage can no longer KO Tabuu.
2. "Auto-Recovery" & "Health Recovery" Powers no longer give bonus healing if you are missing lives.
3. "Brief Invincibility" Power now prevents your Life from falling below whatever amount it was when you picked up this Power. Basically makes you immune to self-damage or other sources of damage besides Tabuu.
4. Added "Healing Shield" Power, which causes Tabuu's attacks to heal you if guarded for half the usual guard damage. Lasts 5 seconds, doubled if activated from the "Random" Power.

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Other Changes
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1. If you are in Tag mode when fighting Tabuu, the number of lives you start with is reduced by the number of characters in your team minus 1. Furthermore, Tabuu's attack power drops based on the number of KO's he gets, instead of the number of lives you have remaining (this also means Tabuu no longer gets an attack power boost if you are in Tag mode). This all helps prevent Tabuu from being extremely easy to defeat in Tag mode.

2. Standing hit animations now use "hit low" sprites, making the "animation" look less silly. (Actual sprites haven't been changed).

3. Added an option to play with infinite lives against Tabuu.

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Update 5 (11/8/2023) <-- I forgot to change this in the "UpdateHistory" file It should be 12/25/2023.
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New Attacks
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1. Added "Set X" attacks, which are attacks Tabuu can use regardless of his current Attack Set, letting him mix up his attacks. Unlike normal attacks, these Set X attacks have a cooldown before Tabuu can use another one (the higher Tabuu's AI Level, the shorter the cooldown). The attacks, and a brief description of them, are as follows:

A. "Electric Orbs" - Tabuu teleports close to your current X-Position and summons 2 Electric orbs that spin around him wildly. Power: 25 (Each orb can hit up to 10 times).
B. "Explosive Teleport" - Tabuu teleports 5 times around the stage like his normal teleport, but an explosion is created just before he teleports. Power: 150.
C. "Burning Floor" - Tabuu teleports to the top of the screen and tosses a small fireball to the ground, which causes a sea of flames to appear when it hits the ground (jump at the right moment to avoid the attack). Power: 600.

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Attack Changes
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*Multi-Strike
1. Knockback decreased.

*Gold Throw
1. Now travels downward slightly further, making it a bit easier to jump over.

*Clone Attack
1. Each projectile fired will now have a small chance of being fired right at an opponent instead of being fired in a random direction. Helps reduce the chance of that silly situation where most of the projectiles end up flying away from the opponent, making the attack deal little or sometimes no damage.

*Multi-Shot
1. The large orb Tabuu hurls at the end of the attack travels slightly faster.

*Off-Waves
1. Base damage of attack reduced by 35% if you are in Turns or Ratio mode.
2. Delay between wave launches increased a bit.

*All attacks
1. None of Tabuu's attacks deal dizzy/guard meter damage anymore.
2. Max extra knockback of all attacks based on your missing life reduced (Should help prevent characters from being flung super high into the air).
3. Proper hitspark added for attacks (default hitspark is no longer used).

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New Options
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1. Added the following options to the "Misc Options" in the Config file:
"Power Growth": This reduces Tabuu's attack power by 25%, but causes him to gain attack power throughout the whole fight, until he gets +100% attack power.
"Super Armor Regen": Tabuu's Super Armor durability will slowly recover over time.

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Bug Fixes
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1. Fixed problem with Tabuu disappearing during Flame Charge.
2. Fixed the Super Armor Break effect not appearing.
3. Fixed a very specific issue where if Tabuu is fought after Round 1, he would be able to start teleporting too early if the opponent had a long intro for rounds beyond Round 1.
4. A Turns/Ratio opponent hit by the Multi-Shot projectile barrage would sometimes be "fake KO'd" and respawn despite the lives system being disabled in Turns/Ratio mode.
5. Projectiles created during "Fire Line" attack had an attack attribute of "A,HA" instead of the proper "A,HP".
6. "Tabuu Charge" attack wasn't giving Power (Super Energy) on hit or block, and could be recovered out of too quickly.

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Power (Item) Changes
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1. The "Auto-Recovery" and "Health Recovery" Powers now add Red Life equal to the amount they heal, preventing them from "healing over" Red Life.

2. "Rage" Power max damage bonus increased from +50% to +75%, and minimum bonus increased from +10% to +15%.
~Empowered Version (from "Random Power"): Max damage bonus up from +100% to +150%, and minimum bonus up from +20% to +30%.

3. "Health Recovery" Power Base healing effect increased from 200 to 250.
~Empowered Version (from "Random Power"): Heal amount up from 400 to 500.

4. "Auto-Recovery" Power Base total healing increased from 300 to 375.
~Empowered Version (from "Random Power"): Heal amount increased from 600 to 750.

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Misc Changes
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1. Tabuu's Super Armor durability is now shown with a green bar under his life meter. When its broken, a Red meter will now show the time until the Super armor regenerates.
2. When Tabuu's Super Armor regenerates after being broken, Tabuu will now teleport out of being hit (unless he is being thrown or in some other custom state). So no more starting a combo just before the super-armor regenerates to more damage in.
3. Attack power loss Tabuu gets based on your remaining Life is higher if you are in Turns or Ratio mode (For Ratio mode, the lower your Ratio, the more Attack Power Tabuu can lose).

4. When Tabuu teleports around the stage, he no longer will teleport only a very short distance away from his previous position (prevents him from "teleporting in place")
5. Respawning characters now get 2 seconds of invincibility (indicated by a glowing PalFX applied to them once they regain control) instead of 0.5 seconds.
6. If you are playing with any Difficulty+ or Misc options activated, you'll now get a bonus to all the points you earned when you defeat Tabuu.

7. Super-Armor is more easily broken by Hyper attacks.
8. Reduced chance of Tabuu teleporting before attacking.