WARNING: THIS IS NOT A VEIGAR GUIDE. THIS GUIDE WAS CREATED FOR USE WITH ZIGGS.
I created this guide mainly because Mobafire has not yet listed Ziggs as an available champion. This is my first build so if you do go onto enjoy it an up vote would be much appreciated.

Runes are pretty straight forward. It's based on giving the most damage output possible but if you already have Flat AP Seals or something and don't want AP Per Level then don't worry.

Masteries are up to you. Those are just the ones I use.

Zhonya's Hourglass can be swapped for more tanky items if you're getting focused (you usually will) so a Frozen Heart or a Guardian Angel would be useful. You can also swap Void staff for Rod of Ages depending on the situation.

I always max Bouncing Bomb first. If you're playing Mid Lane maybe try learning Q, W, E, Q, E, R. When in Team Battles leading in with Mega Inferno Bomb is great for burst damage but is also good for finishing off kills. After Ult follow with Bouncing Bomb and try block of escapes with Hexplosive Minefield. Try not to use Satchel Charge as it can be a great tool for escaping if needed.

Ignite and Flash are recommended but because of Bouncing Bomb's range, feel free to swap Ignite for Exhaust.

I've yet to have played Ziggs in Ranked, (because I'm only Level 25) but if you're team needs an AP Mid then you can't go wrong with Ziggs.

Pros:
-Great Damage Output Mid to Late game
-Will beat most champions mid if you play your cards right
-Satchel Charge is great for escapes
-Bouncing Bomb is a great finishing move for fleeing enemies
-Passive is OP
-Mega Inferno Bomb ('Nough Said)
-All round a very fun champion
Cons:
-Super Squishy
-AD is very low
-Mana Hungry early game

Never Jungle fully as Ziggs but if you just want to pick up Blue Buff (highly recommended) try this:
*Use Satchel Charge to jump the wall
*Lead in with Short Fuse and Bouncing Bomb (should kill both minions)
*Lay down Hexplosive Minefield and move between basic attacks as to make the Golem hit all the bombs
*Finish with a Bouncing Bomb if needed

Try to stay at the back when Team Fighting so you don't get harmed too much and you still do damage.

Only Champion with a trap that lays multiple.

Always try to finish minions with Bouncing Bomb or last hit with Short Fuse.
Laying Down Hexplosive Minefield when they're walking towards you does great damage.

So just to be clear:
THIS IS NOT A VEIGAR GUIDE. THIS GUIDE WAS CREATED FOR USE WITH ZIGGS.
I created this guide mainly because Mobafire has not yet listed Ziggs as an available champion. This is my first build so if you do go onto enjoy it an up vote would be much appreciated.
Runes are pretty straight forward. It's based on giving the most damage output possible but if you already have Flat AP Seals or something and don't want AP Per Level then don't worry.
Masteries are up to you. Those are just the ones I use.
Zhonya's Hourglass can be swapped for more tanky items if you're getting focused (you usually will) so a Frozen Heart or a Guardian Angel would be useful. You can also swap Void staff for Rod of Ages depending on the situation.
Ignite and Flash are recommended but because of Bouncing Bomb's range, feel free to swap Ignite for Exhaust.
I always max Bouncing Bomb first. If you're playing Mid Lane maybe try learning Q, W, E, Q, E, R. When in Team Battles leading in with Mega Inferno Bomb is great for burst damage but is also good for finishing off kills. After Ult follow with Bouncing Bomb and try block of escapes with Hexplosive Minefield. Try not to use Satchel Charge as it can be a great tool for escaping if needed.
I've yet to have played Ziggs in Ranked, (because I'm only Level 25) but if you're team needs an AP Mid then you can't go wrong with Ziggs.
Pros:
-Great Damage Output Mid to Late game
-Will beat most champions mid if you play your cards right
-Satchel Charge is great for escapes
-Bouncing Bomb is a great finishing move for fleeing enemies
-Passive is OP
-Mega Inferno Bomb ('Nough Said)
-All round a very fun champion
Cons:
-Super Squishy
-AD is very low
-Mana Hungry early game
Never Jungle fully as Ziggs but if you just want to pick up Blue Buff (highly recommended) try this:
*Use Satchel Charge to jump the wall
*Lead in with Short Fuse and Bouncing Bomb (should kill both minions)
*Lay down Hexplosive Minefield and move between basic attacks as to make the Golem hit all the bombs
*Finish with a Bouncing Bomb if needed
Try to stay at the back when Team Fighting so you don't get harmed too much and you still do damage.
Only Champion with a trap that lays multiple.
Always try to finish minions with Bouncing Bomb or last hit with Short Fuse.
Laying Down Hexplosive Minefield when they're walking towards you does great damage.
So again: This was my first build so if you go onto using it and like it then an up vote would be appreciated muchly (or you can up vote it anyway for being such a good sport) When Ziggs does become listed I will probably re-write this build as Ziggs so it's more legit so to speak. I'll be making more builds so watch out for more: Brand, Ezreal, Fizz, Garen, Graves, Jax, Lee Sin, Master Yi, Nidalee, Olaf, Rammus, Shaco, Sivir, Teemo, Tristana, Tryndamere, Volibear, Xin Zhoa and of course; ZIGGS, THE HEXPLOSIVES EXPERT ! Thanks so much for reading :)