Johnny should be left for expert players since he is horrible in the hands of a new comer. All of his attacks should be utilized in order to use him to his full effectivness. Due to his low speed, you should either play it completely defensive or completely offensive. Learn how to play as both in order to make him one of the best characters.

Moves List

Glistering Gold - QCF+HS (Makes Mist Finer go up a level. The maximum level is level 3. Level 2 makes the opponent fly up higher without recovery as an option. It also does a bit more damage. Level 3 does a series of slashes instead of one.)
Bacchus Sigh - QCB+P (Makes Mist Finer unblockable)
High Mist Finer - QCF+P (Hold P to delay infinitly and release to use the attack. HS cancels the move. You can't block while in this motion and you can't change Mist Finer angles either.)
Middle Mist Finer - QCF+K (Hold K to delay infinitly and release to use the attack. HS cancels the move. You can't block while in this motion and you can't change Mist Finer angles either.)
Low Mist Finer - QCF+S (Hold S to delay infinitly and release to use the attack. HS cancels the move. You can't block while in this motion and you can't change Mist Finer angles either.) (The opponent must block low to block this.)
Divine Blade - DPM+S then S to use
Aerial Divine Blade - (in air) QCF+S

Overdrive Attacks

Johnny Special - HCB,F+HS

Instant Kill

Press All 4 Buttons to activate the "Attack Mode" then while in it:
Joker Trick - QCFx2+HS

Combos

K, S, HS, QCF+P/K/S
This is a basic 4 hit combo. Follow what it says and you have it right there.

Guilty Gear Mode Changes

Increased stats. That's it.

Gold Form Changes

Unknown at this time.