Fizz can be great either AD or AP, but when i play him ap i just don't get enough done (minion kills or champ kills) i usually end up feeding the enemy when i build ap, but when i build ad i get tons of creep kills and tons of champ kills!

I chose those runes to give me a strong early and late game as it is focused around giving ad and health. The Greater Mark of Alacrity gives great attack speed and Greater Seal of Fortitude gives great health bonus. And the greater glyph of strength gives ad bonus. And Greater Quintessence of Alacrity gives great attack speed

My masteries are set up for great ad because it will deal HUGE amounts of damage to people so if a trundle try's to 1v1 you he will have to think twice about his decision a second time.

My items are focused on what you would want on a tryndamere, heavy ad, attack speed and heavy crit. Which this item build you should be killing like a pro. (if your team needs dragon no problem if you need baron get a tank and kill his ***!)

I chose that skill sequence because When you build attack speed your sea stone trident will stack so i suggest taking that at level 1 and max it first. Then i would get urchin strike because its a great spell to catch up also it does on hit effects with sea stone trident so you can harass good by using urchin strike then land a auto attack for good harass. And play/trickster is good also it can get you out of sticky situations. If your tanking both turrets for kills at the end it will make the turrets not be able to go on you and you can go back.

I usually take flash to catch up or get out of sticky situations and when i just can land the last auto attack off to kill the person ignite.

So as you can see Ad fizz is a lot better than ap fizz because ad fizz you can just do 2 auto attacks and their dead. I hope you like my build.