Nunu is a great ganker. In can hold his own in the jungle. He can counter jungle and gank lanes very early. If you are level 3 and you see that one of you solo lanes are pushed back you will want to go for the gank. Know nunu is not really a great farmer but he is an exceptional ganker. This build is to get in there and Rage. You will not get a lot of (K/D/A). You will have the tanky ability to survive a horrible Beating/Harassment. As every one know in a team fight you do not jump in first if the other team has a CC champion. You jump in after they blow there Disables.

For runes I go for something with a touch.

I use magic pen so My E/ICE BLAST Deals the perfect damage.

Armor Is for the survival ability in the jungle.

Health Is always a survival ability in the jungle

I always have a problem with my Q. For many jungle champions I pick Cooldowns on Glyph.

This gives me around 750 health to being with, 47 Armor and 30 magic resistance. It will take you to level 4 and you will be able to gank a lane very quickly.

For Masteries I don't know what to do. I mainly want to focus on the Utilities. I don't jungle with Cloth of armor and 5 health pots. I go with the Doran's shield, Doran's ring, Elixir of Brilliance or Sapphire Crystal. So I put some effort in the Defence tree. You can't forget to grab smite.

On the Defence tree focus on the Defence mainly. Since you have no health pots it might be hard to obtain the blue buff at level 1 if not done right.

On the Utilities Tree you want to go for the the right stuff.
Perseverance - 3
Good hands - 1
Greed - 1
Blink of an eye - 1
Utility Mastery - 2
Quickness - 3
Meditation - 1

You can go for Flash or Ghost It's you choice in the matter.

Do not pick up Useless summoner spells.
Clarity - Not needed
Rally - Not needed
Teleport - Not needed
Heal - Not needed

Now for the items


I pick up a Doran's ring first, after going for a boots of speed, Then I go for a Quick Catalyst the Protector turning that into a Banshee's Veil/Rod of Ages. After that I buy a Mercury's Treads. Never the less I want magic resistance and Heavy Health regeneration so I go a FoN/ Force of Nature. After you get that item you have enough magic resistance on you. Then I want health. I either go For a Randuin's Omen/Sunfire Cape. Now you want something to offend/harass/Trouble/ Troll etc the enemy team. Then you go for a Rabadon's Deathcap. This will give you the tankyness and the hardcore damage out put on your skills.

Nunu is a great champion that doesn't really need to be itemize. You need to use a build according to there team comp.

For magic resistance You might want to go for A :- Guardian Angel, Aegis of the Legion, Spirit Visage.

For boots You can Go For :- Boots of Mobility, Ionian Boots of Lucidity, Mercury's Treads

Supporting your team will be a good thing. So you might want to go for a :- Shurelya's Reverie, Soul Shroud, Will of the Ancients.

You build is what your enemy focuses on the most.