
Well, I'll give it a shot. 
For some reason, I keep imagining Chachan being like Dan from Street Fighter or Gon from Tekken... 3 (?) or even Deadpool in MvC. Basically a "joke" character that could possibly be dangerous in the right hands. As I started thinking up moves for him, he somehow became that obnoxious counter-character some people don't like.
Chachanji Gegenji
Stage Description
The streets in front of the Quicksand, right where the fountain is. A few generic Ul'dah citizens lined up along the stairs and upper levels. Cameo characters would be hidden amongst the crowd for the sharp-eyed, and the whole thing would be a hooting, hollering, energetic affair.
Moveset Description
Chachan's moveset would be mostly quick, ultra-close-range attacks to utilize his small stature and high speed. They'd probably hit decently hard, but most of his hits could probably be blocked through a neutral or - more likely - low block, though the assault could steadily lower health through chip damage. A definite pressure/combo character.
As a fan of Guilty Gear, I would most likely try to include an additional mechanic for players to utilize. With Chachan, I'd either make either a "Chutzpah" meter or crib the Sunder idea from the "Your Character as an Instance" thread. I'll break down both ideas briefly here.
Chutzpah - As Chachan keeps landing hits without being hit in return, he builds up a meter (seperate from the special meter). As it goes up, so does his attack speed and damage. If he's in a costume that includes his helmet, the rabbit eyes glow more fiercely as the meter fills. In fact, that would probably be the "meter" for it.
Sunder - Landing certain moves on an opponent inflicts stacks of "Sunder," which makes the opponent take more damage. These either stay for the duration for the fight or, much more likely, last until the opponent gets enough time free of attacks to let it fade.
Considering I already used the Sunder effect before, along with the fact that it's definitely more of an MMO mechanic than a fighting one, I'm leaning more towards Chutzpah.
Special Moves
Hare Splitter: Chachanji's only ranged attack, flinging his shield at his opponent. Whether you hit Light, Medium, or Fierce will aim the throw Low, Mid, or High for purposes of blocking. His "Hadoken," so to speak. A "Shinkuu Hare Splitter" (Tranced?) would probably entail throwing the shield with an aftereffect, causing sizable multi-hit damage and dizziness on impact.
Caught'em Tail: A counterattack move where Chachanji bashes aside an attack with his buckler. The move both nullifies the opponent's attack and spins them around to face the other direction, leaving them open to immediate assault. Super version would be multiple bashes, spinning the opponent like a top before leaving them dizzied.
Rabbit Riposte: A counterattack move where Chachanji dodges behind the opponent, evading the attack and punishing the opponent with a multi-hitting rising slash. This both damages and knocks the opponent into the air for aerial combos. Super version would include a Rabbit Medium "dummy" left in his wake, and an energy-wreathed rising blade for more hits and damage.
Usagiado: Chachanji's "Limit Break." The Lalafell sheaths his blade and waits to be hit. Should he be, the screen darkens and a rice paper door (stylized with a Doman painting of a rabbit running through a meadow) slides shut across the screen as the eyes on Chachanji's rabbit helmet flash. Numerous slashes then cut through the door, followed by one final cut that sends all the pieces exploding outward like a shattered window. Massive damage.
Nemesis
TBD.
Intro Quotes
General 1:Â "Hero time!"
General 2: "I'm Chachanji Gegenji, nice ta meetcha!"
General 3: "Well, haldo dere!"
vs. Warren Castille: "A-ah! Ser Warren! I have to fight you?"
Mirror Match: "Whoa! I've never fought me before!"
Win Quotes
General 1: *waving at the screen* "Ser Warren! Ser Warren, didja see?"
General 2: *rewards self with a Yellow Drop, flicking it up in the air and catching it in his mouth*
* Easter Egg: Should the remaining time's numbers match (ex. 44, 22, etc), Chachanji will fumble the catch and run off screen after his wayward treat.
General 3: "Bunnytrick!" *removes helmet, revealing the Rabbit Medium, which then disappears in a puff of smoke*
vs. Warren Castille: "I... I won? Don't tell me you were holdin' back, Ser Warren!" *fume*
Mirror Match: "Yay! I think...?" *thoughtful pose*
Lose Quotes
General 1: "Owowowow! I yield, I yield!"
General 2: "Wow, you're strong!"
General 3: *exaggerated pouting*
vs. Warren Castille: "Ehehehe... guess I still gotta lot ta learn from ya, huh?"
Mirror Match: "Wait... I'm confused. Who won?" *thoughtful pose*

For some reason, I keep imagining Chachan being like Dan from Street Fighter or Gon from Tekken... 3 (?) or even Deadpool in MvC. Basically a "joke" character that could possibly be dangerous in the right hands. As I started thinking up moves for him, he somehow became that obnoxious counter-character some people don't like.
Chachanji Gegenji
Stage Description
The streets in front of the Quicksand, right where the fountain is. A few generic Ul'dah citizens lined up along the stairs and upper levels. Cameo characters would be hidden amongst the crowd for the sharp-eyed, and the whole thing would be a hooting, hollering, energetic affair.
Moveset Description
Chachan's moveset would be mostly quick, ultra-close-range attacks to utilize his small stature and high speed. They'd probably hit decently hard, but most of his hits could probably be blocked through a neutral or - more likely - low block, though the assault could steadily lower health through chip damage. A definite pressure/combo character.
As a fan of Guilty Gear, I would most likely try to include an additional mechanic for players to utilize. With Chachan, I'd either make either a "Chutzpah" meter or crib the Sunder idea from the "Your Character as an Instance" thread. I'll break down both ideas briefly here.
Chutzpah - As Chachan keeps landing hits without being hit in return, he builds up a meter (seperate from the special meter). As it goes up, so does his attack speed and damage. If he's in a costume that includes his helmet, the rabbit eyes glow more fiercely as the meter fills. In fact, that would probably be the "meter" for it.
Sunder - Landing certain moves on an opponent inflicts stacks of "Sunder," which makes the opponent take more damage. These either stay for the duration for the fight or, much more likely, last until the opponent gets enough time free of attacks to let it fade.
Considering I already used the Sunder effect before, along with the fact that it's definitely more of an MMO mechanic than a fighting one, I'm leaning more towards Chutzpah.
Special Moves
Hare Splitter: Chachanji's only ranged attack, flinging his shield at his opponent. Whether you hit Light, Medium, or Fierce will aim the throw Low, Mid, or High for purposes of blocking. His "Hadoken," so to speak. A "Shinkuu Hare Splitter" (Tranced?) would probably entail throwing the shield with an aftereffect, causing sizable multi-hit damage and dizziness on impact.
Caught'em Tail: A counterattack move where Chachanji bashes aside an attack with his buckler. The move both nullifies the opponent's attack and spins them around to face the other direction, leaving them open to immediate assault. Super version would be multiple bashes, spinning the opponent like a top before leaving them dizzied.
Rabbit Riposte: A counterattack move where Chachanji dodges behind the opponent, evading the attack and punishing the opponent with a multi-hitting rising slash. This both damages and knocks the opponent into the air for aerial combos. Super version would include a Rabbit Medium "dummy" left in his wake, and an energy-wreathed rising blade for more hits and damage.
Usagiado: Chachanji's "Limit Break." The Lalafell sheaths his blade and waits to be hit. Should he be, the screen darkens and a rice paper door (stylized with a Doman painting of a rabbit running through a meadow) slides shut across the screen as the eyes on Chachanji's rabbit helmet flash. Numerous slashes then cut through the door, followed by one final cut that sends all the pieces exploding outward like a shattered window. Massive damage.
Nemesis
TBD.
Intro Quotes
General 1:Â "Hero time!"
General 2: "I'm Chachanji Gegenji, nice ta meetcha!"
General 3: "Well, haldo dere!"
vs. Warren Castille: "A-ah! Ser Warren! I have to fight you?"
Mirror Match: "Whoa! I've never fought me before!"
Win Quotes
General 1: *waving at the screen* "Ser Warren! Ser Warren, didja see?"
General 2: *rewards self with a Yellow Drop, flicking it up in the air and catching it in his mouth*
* Easter Egg: Should the remaining time's numbers match (ex. 44, 22, etc), Chachanji will fumble the catch and run off screen after his wayward treat.
General 3: "Bunnytrick!" *removes helmet, revealing the Rabbit Medium, which then disappears in a puff of smoke*
vs. Warren Castille: "I... I won? Don't tell me you were holdin' back, Ser Warren!" *fume*
Mirror Match: "Yay! I think...?" *thoughtful pose*
Lose Quotes
General 1: "Owowowow! I yield, I yield!"
General 2: "Wow, you're strong!"
General 3: *exaggerated pouting*
vs. Warren Castille: "Ehehehe... guess I still gotta lot ta learn from ya, huh?"
Mirror Match: "Wait... I'm confused. Who won?" *thoughtful pose*