This thread needs more activity, so allow me to do stuff...
Who is Dillon?
Dillon is the star of two relatively successful Nintendo eShop games, Dillon's Rolling Western and Dillon's Rolling Western: The Last Ranger, respectively. Dillon himself is a silent cowboy armadillo, who works together with his squirrel partner, Russ, to defeat the hungry Grocks before they can eat all of a village's food.
That's cool, but what can he do?
Dillon's main means of attacking is to roll into a ball and charge towards an enemy. After this, Dillon can jump out of his roll and initiate a Claw combo, visciously slashing away at enemies. Dillon has multiple ways to change his attacks; he can burrow under the ground and emerge ahead, attacking enemies from the ground. Dillon can charge his roll to deal more damage, and can grind against his opponent after making contact to deal more damage.
Alright, but why should Dillon even be in Smash as a playable character and not an Assist Trophy?
Sakurai loves unique characters and WTF additions; Dillon would be a little bit of both.
Dillon differs greatly from Sonic, despite rolling around a lot. Dillon could focus on racking up damage and getting in close with his charge rolls. At the same time, he's not really popular, and would probably be like Marth and Roy were back in Melee.
Having Dillon as an Assist Trophy COULD work, but then again, lots of Assist Trophies could work well as characters.
Sounds good, but I'm not completely sold on his playstyle. I don't want a Sonic/Little Mac clone...
Don't worry, Dillon is VERY different from the two, as stated above. Here are some specials that he could have;
B-Charge Roll
Dillon curls into a ball and charges up his roll. He goes about half the distance of Final Destination at full charge, and can stop mid-spin at anytime. By doing this, Dillon can immediately follow into other attacks.
Side Special-Grind Attack/Claw Attack
Dillon rolls forward, similar to his Neutral Special, but this time, cannot stop mid-spin. This time, Dillon will either stop at half of FD, or when he makes contact and will grind against the opponent, somewhat like Sonic's down-throw. Dillon can also burst out of his spin and unleash a strong claw swipe that has strong horizontal knockback.
Down Special-Mole Attack
Dillon burrows into the ground and moves around for 5 seconds, at the end of the time or at the players choice, Dillon bursts out of the ground, rocketing out of the ground like a cannonball.
In the air, Dillon rockets straight down. Anyone hit by this attack will be 'meteor'ed and fall straight down as well.
Up Special-Russ
Dillon lifts his hand up, and Russ flies up from the backround, lifting Dillon up and flying up. Dillon can move around like a slightly nerfed R.O.B. due to weight, and lasts the same amount of as Snake. Dillon does not helpless fall after using this move.
I'll add more later.