Pros:
Great early game
Kill champions really fast
Easy to go jungle early
Truning into a dragon and burning the ground looks badass.
Fast

Cons:
SQUISHY!

I Like to use Ignite and Flash because they can be really useful early game.

I go 9 Marks of Desolation, 9 Seals of Strength, 9 Glyphs of Alarcity, and 3 Quintessence's of Strength.
The armor pen. from the Marks is great for Shyvana since she is up there in melee range constantly attacking.
The strength from the seals are great for early game harass since you will hit harder.
The attack speed from the Glyphs are great for Shyvana since you are an attack speed based champ, and they help you harass early game.

This is a Shyvana build guide that I have been using since the first time I played the champ. After watching the Spotlight I noticed that she is always up there in your face and a pain in the *** to get away from. So I figured "Hey! Lets make her hit hard, attack super fast, and destroy tanks."

This build isn't really going to be that in-depth, it's my first build guide and honestly, I have never read a guide, I just look at the items, runes nad masteries in them.

Early game is where Shyvana really shines in my opinion. It's all about that W/Q harass.

Always try to get solo top if you have a jungle, that is where she is the best, especially if they also have a jungle and your going 1v1 on top.

1v1 Top

So to harass you want to wait until level 2. At level 2 you get your Q and thats when you can start to hit really hard. Try to let them push, once they are far enough away from their tower, you run in with your W (Since you run really fast) and hit them with your Q. You'll notice that half their health is gone!
(They will most likely Flash away at this point)
But since you had them far away from their tower, you pop ignite and continue to chase them. Your Q will be back up again and you will kill them.

2v1 Top

Since Shyvana is really squishy, your going to want to be really patient when you are solo top against 2 others. Your going to want to fight under your tower and harass them when you know your not going to get focused down( and you will die fast).
Since farming is extremely easy when you use your W, you can clear out the minions with ease against 2, and do a lot of damage when your jungle comes up for a gank.

2v2 Lane

When you are with an ally in a lane in a 2v2 situation, your going to want to harass as much as you can. you level 2 harass can be really usefull if you both focus the squishier teamate of the other team.

Mid Game I like to farm, and jungle for Red. If you have no jungler your going to want to go jungle after your first B. at that point you should have your Zeal, and you will be able to clear the jungle no problem.

Wait for your tank to initiate the team fights and pop your dragon form. your going to want to fly over their team to do the 200+ damage to as many of them that you can. Once you are there, sit in the back of their team, facing all of them and pop your Q. While in dragon form your Q does cleave damage, so when you hit facing their whole team, you hit for a lot of damage to everyone. After, you will pop your E on all of them to lower their armor and pop W also to do area damage. continue to spam your abiliteies until they are all dead and go have fun!