The Joker (Jack Nicholson)

Helicopter
Joker Nicholson is dropped off at the battlefield by a helicopter. This helicopter also drops off Ledger.

Neutral B - The Pen is Mightier than the Sword
Joker Nicholson chucks a quill pen that'll stab the character in the head. Any equip item/object (ex: Coballita's flower) will be replaced by the quill pen, dealing damage at first and having it gradually build up. The quill pen will drop after a slight bit of movement. You're unable to use the quill pen any longer, so Bob the Goon will help you instead (the Boba Fett of Joker Nicholson, FYI), who shall follow you around like Captain N's assistant characters after his battery power's dry and Kronk. Upon pressing B during anyone's attack, Bob will jot it down in his notebook, then shoot the opponent in the back for redoing the attack. And he teleports like he did between shots in the movie.

Side B - Destroy A Painting
Bob will shank the opponent with a big knife, simple as that. Slow execution, but strong. While he charges forth at the opponent, you can make him halt upon pressing B. After that, Bob's next stab will be twice as powerful. Also, he'll be unstoppable, so you can't exactly stack it up.

Up B - Stepping Stone
Using his back, Bob throws Joker Nicholson upwards. Anyone in the way of him will be knocked back.

Down B - Joker's #1
Joker Nicholson will literally "fire" his goon, which recovers a bit of health and makes Bob unable to be in use any longer. He can come back upon throwing another quill pen, though, but the more you "fire" him, the less damage you recover from.

Side B - Extendable Gun
Joker gets out his comically long pistol and fires. You will (and yes, "will", not "can") fire in any direction spamming. This is chargeable. The more you charge it up, the more able you'll be to take down larger opponents, especially those that resort to flight.

Up B - Laughing Gas Balloons
Joker Nicholson ascends via balloons full of laughing gas. This is similar to Villager's Balloon Fighter recovery, but it releases laughing gas in the process that will, what else?, leave the opponents laughing.

Down B - Clown Antics
Joker Nicholson randomly uses one of 3 antics up his sleeve:

False Flower
Joker's flower will shoot a blob of acid that will burn. It'll also make a puddle upon hitting the floor.

Dentures
Joker's dentures will rapidly bite as it walks forward. They can really be a pain, and WILL knock you off cliffs, so watch your ass.

Glasses
Joker's glasses are a good defense against projectiles (somehow), but they break upon physical harm.

Final Smash - A Little Hot Under the Collar
Joker Nicholson (though he has to be close to someone) puts his hand forward, letting the opponent grab it. Then a cutscene plays where Joker will want to shake hands with the opponent. Upon that, the opponent will trigger Joker's joy buzzer, which will burn the opponent alive, causing an instant KO. If you choose to use both Jokers, Nicholson swaps over to Ledger as he takes off in the helicopter.

KOSFX
KOSFX1: "Uhlhlhlhlh!"

KOSFX2: "Oof!"

Star KOSFX: *laughs maniacally*

Screen KOSFX: "You wouldn't hit a guy with glasses--"

Bob's KOSFX: "You...idiot!"

Taunts
Up: "Ever dance with the devil in the pale moonlight?"

Sd: "BOO!"

Dn: *laughs*

Up/Sd/Dn (w/ Bob): "You...are my #1."

Victory Options+Failure/Clap
1. *does a victory dance while it rains cards*

2. "Jack is dead. You can call me The Joker."

3. *sniffs* "If I join, you'll weep." *laughs*

4. (after ending it w/ the final smash) *laughs*

Failure/Clap: Drowns...?

Skapokon's Overview
Skapokon: "Hi, I'm Skapokon, and this is Retropokon, your gaming time machine. Look, it's the Joker...or Jack Napier. Why does almost every character played by Jack Nicholson have to be named Jack? He was the guy who murdered Thomas Wayne, the boss of Wayne Industries. Later, he went under the name of the Joker, becoming Batman's biggest enemy. Since he's a clown, he makes jokes. Yes, just like me, but his kill people. How funny. He's also helped by his henchman, Bob the Goon, who would be really helpful if he stopped killing him to recover from damage. I wouldn't do that to a partner! Unless he was Sir Pokon, of course."

Character Description
TBA

Classic Mode
TBA

Extras
TBA

Trivia

 * Rather than be separate, Joker Nicholson can be swapped with Ledger after pulling off his final smash.