Are we talking SS4 or what kind of system?
These are the stats I used in my display game for Joker:
The Joker
Strength 4 Mind 5
Resolve 4 Agility 5
Hits:
KO
AP: 8
Physical Hit 5 Resist 4
Mental Hit 5 Resist 4
Attacks (3 AP)
Joy Buzzer [5]: Melee 6 Damage
Fish Guns [5]: 18" Range 6 Damage
Joker Gas
Powers/Abilities
Clown Prince of Crime (A): Joker is immune to all fear-based Resolve Tests.
Thanks Doll (2): Heal 1 Hit from Joker. Deal 1 Hit to Harley Quinn.
Smiling Psychopath (A): A model must win an Opposed Resolve Test to Charge Joker.
Deadly (A): Any model ending their Activation in Base Contact with Joker takes 1 Damage.
Smilex (A): Joker ignores all Gas and Chemical based attacks.
Probably needs work, been a while since that game.