The Invent an "unlock able" Feature, Character, Stage ect

[BerryBomber]

Unlock REGGIE:

Do 1000 push ups using the Wii Fit Trainer's crawl move to ready your body
OR
Land on the Wii Fit Board in the Wii Fit room 500 times

Unlock GOKU:

Become real super sand by posting 10 Miiverse posts in the Smash Bros Community containing the word "Goku"
OR
Use Mega Lucario's aura sphere fully charged 50 times

Unlock WALUIGI:

Summon Waluigi 20 times in a assist trophy, then he will cheat the game and join the roster!
OR
Work harder than Waluigi by playing 50 hours of Smash Brothers!

 

[Thane of Blue Flames]

Use every character in a doubles team.

Unlock 6-Player mode.

 

[Eternal phoenix Fire]

Captain Falcon:

Get "Poser" in a multiplayer match.

 

[Tornado_Man]

Little Mac: Falcon Punch every other character in the game

 

[HatsuneMiku]

Roy

Play as Marth on a Melee stage in VS Mode 15 times.

Mewtwo

Use a MasterBall at least once in Classic Mode/Adventure Mode on Normal difficulty using any Pokémon character.

Captain Falcon

Beat Classic Mode faster than 10 minutes.

Ganondorf

Play as Link or Zelda/Sheik on any Zelda stage in VS Mode 15 times.

Luigi

Beat Classic Mode/Adventure Mode on any difficulty using Mario.

 

[Hayzie]

Unlock Tetra:
Pair Toon Link & Sheik in a Team Battle and win on any Wind Waker stage, VS CPU level 5 or higher or in an online match.

Unlock Dixie Kong:
Destroy and open 200 Item Barrels. or throw 500 banana peels at players.

Unlock Alternate Costumes for Super Mario Series:
Play as all colors for all characters from the Super Mario Series.

Unlock Alternate Costumes for The Legend of Zelda Series:
Play as all colors for all characters from The Legend of Zelda series.
etc.

Unlock a New Custom Move Set:
Connect a total of 1000 Smashes of a particular character. Total accumulated by completing matches, win or lose.

Unlock Ridley:
Shoot Director - Masahiro Sakurai in the credits

 

[the smash nerd]

I have one
Bowser Jr
Play as orIn any Super Mario stage in VS Mode VS CPU of any character

 

[Capybara Gaming]

Palutena - Beat Adventure Mode as Pit in under 10 minutes.

 

[the smash nerd]

Palutena - Beat Adventure Mode as Pit in under 10 minutes.

Aw, But That's Hard

 

[Sabrewulf238]

Unlock Isaac
* Complete event "Mind Over Matter" [Hard] (Pick any character and defeat Ness, Zelda and Mewtwo on battlefield)
* Play 350 regular matches.
* Use the Djinn item 50 times in battle.

 

[liets]

Smash coins trophy: beat event "Luc Of The Draw" on hard. This event consists of fighting a paired Lucario and Lucas on some stage

Lakitu Trophy: take a picture on any Mario stage

8-bit mario trophy: beat event "kicking it old school" on normal. This event consists of fighting a separate R.O.B. and Mr. G&W on balloon fight or the inevitable wii u retro stage, with only items such as the special flag, fire bar, fire flower, bob-omb, bomchu, boomerang, POW block, hothead, hammer, pitfall, and the like. you get the picture

Master Ball: fight an all-pokemon match with level 6 or higher computers (if all four aren't people) on the kalos league stage

 

[Brickbuild101]

To unlock Pink Gold Peach, one must make Peach use a Metal Box, which will keep her stuck in Pink Gold form permanently. Enjoy!

 

[ErenJager]

Connect your 3DS version of Smash with your Wii U version.
Have an animal crossing save file.
Unlock your Villagers appearance as an alt costume for Villager in Wii U version.

 

[Morbi]

Ganon: Defeat Link as Ganondorf 100 times.
Toon Link: Defeat Ganondorf as Link 100 times.

Just based on the Zelda timelines; it would be some nice fan-service. There would be an alternate way of unlocking them, of course.

 

[Luigi#1]

Baby Waluigi.

1. Beat 999 matches againsted lv 9 Luigi in a row, 99 stock each round.
2. In classic mode, in second round, as Wario, corkscrew the opponent 5 times in a row, and then summon Waluigi as an assist.
3. Quit the game 5.69274 seconds after summoning Waluigi.
4. Watch a marathon of Twilight movies.
5. Jump of a cliff exactly 10293.28514839 feet high.
6. Give the devil your soul.
7. Beat the ghost of Hiroshi Yamauchi in a match using Ganondorf.
And TADA, Baby Waluigi is unlocked!

 

[Canuckduck]

Luigi:

Get K.O.'ed 184 times


Little Mac:

Play 30 matches on the Boxing Ring


Mario Galaxy:

Beat Classic mode with Mario on normal or higher

 

[Luigi#1]

Luigi:
1. Use the name L.
2. Play 2401 matches.
3. Reality becomes an L.
4. La li lu le lo! La li lu le lo! La li lu le lo!

 

[Canuckduck]

Luigi:
1. Use the name L.
2. Play 2401 matches.
3. Reality becomes an L.
4. La li lu le lo! La li lu le lo! La li lu le lo!

This says it all.

 

[Wario Bros.]

Unlock Steve from Minecraft, Goku, & Shrek

Beat 15-Minute Melee/Brawl within 3 minutes.

 

[powerprotoman]

ridley
play giant melee/brawl 10 times with only super shrooms on

 

[KatKit]

Megaman:
1.) Buy him as DLC (Darn you, Capcom)
2.) Use the name Rock and win a match
3.) Use any projectile while running and shooting 10 different times.
4.) Customize a stage. Copy said stage, reskin it a bit, and give it a new name.

Wii Fit Trainer:
1.) Run, swim, jump, and walk a total of 1,000 miles each in-game.
2.) Beat Classic mode with Wario, Mario, Bowser, King Dedede, and Kirby.

Rosalina:
1.) View the Stafy, Warpstar, and Star rod trophies.
2.) Get 50 star Ko's

Villager:
1.) Pick up all items
2.) Change the date and time of your console.

Jigglypuff:
1.)Break your own shield

Ridley:

1.) Eat a Big Mac
2.) Listen to some notorious B.I.G.
3.) Eject the disk at the character select screen. Grab the disk. Talk to it. Make it feel comfortable. Pray he's in. Reinsert disk.

 

[liets]

Megaman: Customize a stage. Copy said stage, reskin it a bit, and give it a new name.