There's 2 foxes (3 if Naruto's Final Smash is counted)

Title: ghostbusters!

In-Game Description: fight something you dont even see!

Players:you pick, random level 6 enemy

Rules: enemy has invisibility but player isnt, you have 2 stocks, enemy has 1 stock

Stage: silphs co.

Items: nothing k

Terms of Victory: you take away the enemy's 1 stock and win

Terms of Failure:you lose all your stocks

Additional Details: name tags are removed

Title: Battle of Gods

In-Game Description: A golden hero with seven legendary artifacts... but which one are we talking about again?

Player: Super Saiyan Goku
Opponent: Super Sonic

Rules: 300 Stamina, Turbo

Stage: Central Highway (Hazards on)

Items: None

Terms of Victory: Defeat Sonic.

Terms of Failure: Lose all HP or fall off of the stage.

Additional Details: Your down-special is disabled. Trying to use the Spirit Bomb will do nothing.

Title: OVER 9000!!!!!

In-Game Description: See if you can last against three powered up Goku's in the most hectic stage ever...Bomb Factory

Players:You choose; 2 stocks

Opponent: 3 lvl9 Goku's who all have infinite Kioken; all have three stocks, nine total

Rules:Kill everything/survive

Stage:Bomb Factory

Items: None

Terms of Victory: Beat all 3 Goku's

Terms of Failure: Lost all stocks

Additional Details: N/A

P.S sorry Phoenix stole your title

Title: Westballz Style

Players: Captain Falcon, 1-Stock

Opponent: Fox, 1-Stock, 60%

Rules: 1-Stock, 60%

Stage: Yoshi's Story

Items: None

Terms of Victory: Perform the Sacred Combo

Terms of Failure: Let Fox kill you.

Here's an ssf2 sacred:http://m.youtube.com/watch?v=9oeGAh1Ie74

Ninja Training

Defeat all of the Shieka's before you are overwhelmed

1 Player, Naruto, 4 stocks
3 lvl7 Shiek CPUS, each 2 stocks

Fourside

No-items

Take out all of the Shiek's stocks in 3 min.

Lose all of your stocks or fail to defeat the Shieks in time

Turbo Mode is on.

Title: Let us all meet again on the battlefield!

In-Game Description: These all-star veterans have been around training since the start, time show whose grown the most

Players:
Player 1: has a choice between Mario, Kirby, Ichigo, and Lloyd
Player 2, 3, 4: are all level nine and the characters that you didn't pick

Rules: 3 stock for all and is a free for all.

Stage: Battlefield

Items: none

Terms of victory: all the CPU are defeated

Terms of defeat: you are defeated

Additional Details: Lighter gravity and characters move faster
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Title: I'll clear this in an instant.

In-Game Description: Aizen has recruited some well respected swordsmen to lead an assault, take them down before he appears on the field.

Player 1: Ichigo
Player 2: Link CPU level 6
Player 3: Sora CPU level 6
Player 4: Marth CPU level 6

Rules: Player has three stocks while the computers all have two stocks.

Stage: Hueco Mundo

Items: none

Terms of Victory: If player defeats all CPUs before Aizen appears.

Terms of Defeat: If Aizen appears and any CPU is still alive or if player dies.

Additional Rules: Match is over as soon as Aizen is there.
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Title: Heroes are the ones who protect.

In-Game Description: Two heroes meet on the battlefield of kingdoms but with the one they protect behind them.

Player 1: Mario
Player 2: Peach CPU level 9
Player 3: Link CPU level 9
Player 4: Zelda CPU level 9

Rules: Player 1 gets two stocks and is on a team with Peach who has one stock. Link has infinite stocks and is on a team with Zelda who has one stock.

Stage: Temple

Items: none

Terms of Victory: KO Zelda

Terms of Defeat: Peach gets KO or Player loses all stock

Additional Details: Peach is located on the upper left side of the stage while Zelda is on the upper right hand side of the stage. Peach and Zelda will not move from their spot unless the opposing team gets within a certain range for them then they attack that player out of their range. An example would be if Mario hops over that rock pillar on the right side of the temple this would cause Zelda to attack Mario until he is out of her range again in which case she simply walks back to her area.
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Title: The Great Fox War Saga

In-Game Description: Show these foxes what it means to be true demon fox.

Player 1: Naruto
Player 2: Fox CPU level 7
Player 3: Tails CPU level 7

Rules: The KOs that count are when Naruto in nine tails mode and Naruto has 2 stocks.

Stage: Meteor Campaigns

Items: none

Terms of Victory: KO both Tails and Fox

Terms of Defeat: Naruto loses all stocks

Additional Details: As stated above Naruto has to defeat them in his final form. Tails and Fox have infinite stocks if defeated regularly but only have one stock if Naruto defeats them in Nine Tails form.

Title: Super Smash Flash .EXE

In-Game Description: Oh no, we're not supposed to talk about this one...

Players: Mario (you), Meta Knight, Sonic (Red recolor), Naruto

Stage: Pokémon Colosseum (Hazard switch off) (Music: Final Destination)

Rules: Damage ratio is at 2.0. Three stocks. Damage will immediately spike to 999% once it hits 50%.

Terms of Victory/Defeat; Be the last person standing.

This my first time using a quote so I might mess up in it so please forgive me if I do.

And I just would like suggest the idea of changing player 1 to Tails since in that game I think Sonic kills Tails in it not Mario. If I got that wrong feel free to say so; I haven't personally played and only saw footage of it two years ago I believe.
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Title: Gen 7?

In-Game Description: Help your trainer weaken these new "Pokemon" for the catch but be sure to not let them faint

Player 1: Pikachu

Player 2: Kirby CPU level 5

Player 3: Tails CPU level 6

Player 4: Sonic CPU level 7

Stage: Saturn Valley

Rules: Pikachu has three stocks and the rest have one each. The match ends if Sonic, Tails, or Kirby are knocked out.

Terms of Victory: catch all three new "Pokemon"

Terms of Defeat: KO Tails, Sonic, or Kirby. If Pikachu loses all sticks then match is lost as well.

Addition Details: Kirby, Tails, and Sonic are one at a time and in this order after the previous one has been caught. In order to catch one the player must damage the opponent until they go to 100% and wait five seconds after getting them to that percent this makes the opponent disappear and go into the next one in the order.

But this event would become completely outdated once Gen 7 (if there's any) come out.

That is true with yearly Pokemon release gen 7 is bound happen soon with their fairy magic conch shells [just a joke I still like Pokemon to a certain degree... But Keychains = Dragon Killer... Come on]. I don't know what I could call the event if you could come up with one then it's much appreciated I guess cause not sure if any of these are getting in but it's the thought that counts. And hey it's still fun to make these.
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Title: Dynamic Passion

In-Game Description: Some people just don't understand the art of bombs so show them what it makes to be a BomberMAN!

Player 1: Bomberman

Player 2: Link CPU level 7

Player 3: Peach [a play on words for Peach Bomber] CPU level 7

Player 4: Wario [the gas bombs he does..] CPU level 7

Stage: Bomb Factory

Rules: everyone has two stock and player 2,3,4 are all on one team

Terms of Victory: defeat the opposing players

Terms of Defeat: you lose all your stocks

Additional Details: all bomb related attacks or stage hazard set ups will do two times the damage [Peach's side special and Wario's down special count as bomb moves is this fight]. Bombs in the Bomb Factory will only have one appear at a time not having the line of bombs going across. The bombs on the Bomb Factory will not explode unless Bomberman has one his own bombs on it and makes it explode. Setting off the bomb will cause the string of bombs to explode now and next single bomb appears in Bomb Factory.

*takes a few minutes to figure it out*

...you thought I was referencing that dumb creepypasta, weren't you? Well, that's not what I was referencing. SSF.EXE is the formal name of SSF1's downloadable version. The Red Sonic references Blade, the infamous Sonic recolor OC that was featured in that game. Meta Knight and Naruto are also prominent SSF1 veterans.

Sorry if that game offended you and personally I don't like either but that's just what I thought your going for. I have to say now that I know the real concept behind your event I like it a lot more and it's very cool. I played SSF before SFF2 so I think it's a nice little reference and I never could master Blade his side b was to weak and he lacked the killing status almost every character in the game had. My fav was Zero back in that game.
Edit: I just figured out that 50% thing out to cause in SSF you can instantly if at and someone does an up attack on you. I have to say very clever sir very clever.

I'm pretty sure you should change the enemies, and make the playable character selectable.
Mostly because it was really frustrating to finish Event 10 because of the smae reasons.
Also, I don't think Meta Knight and Naruto represent Smash Flash 1 very well. Mostly because I'm pretty sure almost no one mained Kirby (except for me) and that Naruto had a pretty repetitive moveset.
I think Link and Pikachu represent the first game a bit better, but I think this event should have more than 3 enemies (in other words, like the All-star events in Melee and Brawl)

That would interesting so it would kind of like that melee mission where you kill twelve Yoshis on Rainbow Cruise? And another thing you could use is Emerald Cove or Sky Sanctuary to reference that extremely long adventure stage: Floating Islands cause I feel that's the most remember able stage for the wrong reasons... That and Emerald Hill Zone with those Buzz Bombers...