I have played Alistar since I started playing this game as he was the second Champion I ever bought. He is my most played Champion in ranked games with a 70% win ratio, my win ratio when actually jungling with him is something like 90% or at least close to it. My ELO is nothing to brag about but it's also not very important as facts are facts no matter who it comes from.

I have tried playing Alistar in every way you could possibly imagine and this one is from my own experience the most efficient one and the way that is easiest to carry with.

I will go ahead and explain the reason behind building Alistar this way.

Moohammad Ali.

Enough said.

Standard jungle path: Wolves>Blue>Gank>Red/Wraiths/Golems>Gank>Gank>Gank>Gank

What you want to do jungling Alistar is gank and gank again. You should not camp lanes too much before you have a  and not even at that point should you camp very much. Only if you have both a  and a  should you really consider camping lanes as you need to have a stable gold income if you're just gonna sit in brushes and wait for gank opportunities. 

When clearing the jungle creeps you do not want to use heal too much before you get to the camps if you have HP Potions, instead just use the Potions since they don't drain your mana or put a passive-activating skill on cooldown. Yes, Alistar actually activates his passive.

I usually gank mid or top straight after getting blue as these are the lanes that snowball the hardest. Ganking bot lane early is not a bad choice as most players don't expect level 2 ganks in that lane, especially not if you gank through the lane brushes.

When ganking you usually want to get behind the enemy champion and push him towards your teammate with Headbutt and follow up with Pulverize but in some situations it's better to just Headbutt>Pulverize combo them. Let's say you are ganking midlane and your teammate is an Anivia, who relies heavily on her stun to deal damage early game, then it's better to make sure she cannot miss it by simply Headbutt>Pulverizing the enemy and keeping him/her in place. You should always Headbutt enemies into walls if possible as it locks them up for several seconds making them easy targets. This is very hard to do when ganking midlane as there aren't many walls to push the enemy against but if you see an opportunity, go for it.

Whenever you know that an enemy on a lane does not have  or any other abilities that may mess up a towerdive you are free to walk through enemy turrets to get good angles but only do this if you are healthy enough to survive several turretshots and if there is no other way to gank the enemy. You may always consider towerdiving when your ult is up but you need to make sure you use it at the right time. If you're towerdiving a Cassiopeia that has her ult up you should probably wait until she uses it before you press R, but if she decides not to use it right away when you come at her you should just ult straight away to take less damage. I usually would not recommend towerdiving a post-6 Cassiopeia as it is very dangerous but if you know you'll survive then go ahead.

An important thing to note is that since  got nerfed you can't  over Alistar to avoid his Pulverize unless you're standing on top of him. So, if you Headbutt someone towards your ally you just walk up to them and Pulverize as soon as you get in range and they will probably waste their  unless they have learned that you can  AWAY from Alistar in order to avoid getting knocked up. At IEM Hanover I saw Scarra make that stupid but oh-so-common mistake when he tried to  over Gosu Pepper's Alistar. He was dead either way since Diamondprox's Lee Sin was there as well but in the end it was a waste of a .

Depending on how the game has gone up until this point and/or what champions are in each team you will want to do different things when teamfighting.

If all the damage on your team comes from your AD Carry and not much comes from any particular Champion on the enemy team peeling for your AD Carry is most likely the best option. When peeling you want to stay close to your Carry and Headbutt any threat away from him/her and Pulverize everything that you didnt Headbutt, you also want to stand in front of your Carry so that you can block any skillshots that are directed at him/her. Basically, protect your Carry. However if the only one on your team with damage is your AD Carry but it's somehow the same for the enemy team you might want to consider zoning their Carry or (if you are fed/farmed, aka got  and Armor) killing them 1v1 by simply Headbutt>Pulverizing them and then ulting and auto-attacking them to death. NEVER leave your AD Carry alone if there is no one else to protect him/her.

As mentioned earlier, if the enemy Carry is really fed but you are at the stage were you can 1v1 him/her or at least zone him/her then you might want to consider doing that, especially if your AP Carry or Bruiser have a hard time getting to their Carry because Alistar will never have a hard time getting way back into the enemy team. You may also want to >Pulverize>Headbutt their Carry into your team if you know they can burst him/her down faster than you can say alistarcarrieduswithbestengageeverggwpali. If the enemy Bruiser is fed you should consider Headbutting them away from the fight, preferably over a wall, this is also a situation when you should protect your Carry.

If your team sucks and no one has any damage you might as well just dive for their Carries and try your best to kill them since there is no one on your team worthy of protection.

When all your team needs is CC you should wait until you get a good opportunity to Pulverize several enemies. if you manage to Pulverize 5 enemy Champions and you still lose the fight you might as well surrender. Also, do not spam your heal throughout fights if you have 3 or more points put in to it as it will make you run oom extremely fast, only spam it if you know the fight will be very short and/or that you wont need any mana for a while after the fight. You should obviously use the skill no matter what but if the teamfight is close to minions that die to aoe and you get the cooldown back consecutively it might be a better choice to hold on to that mana for a Pulverize or Headbutt.

When your team needs someone to initiate you can perform that job very well by Headbutt>Pulverizing 2+ enemies that are relatively easy to kill or >Pulverizing 2+ enemies. Make sure not to >Pulverize anyone if your team is not nearby as it is quite useless and only puts your dear  on cooldown, it's not even worth it if you kill the guy alone since you could just Headbutt>Pulverized him instead. 

Never run away from your team unless you manage to zone both their carries by doing this. In SoloQ you should never trust in that your team will do anything correctly so it's usually better to just stay with your team.

If it's late game and you have a Vayne just protect her no matter what (unless she has proven to be the worst League of Legends player of all history), it's mostly 100% worth it.

NOTE: Always make sure to use  when your teammates are close and you're going to intiate. You cannot 1v1 the enemy Carry of you do not build a Trinity-Force or any other damage items, so if you plan on going full tank then there is no point in trying to 1v1 their Carry.

Before we get into the -combos I should probably explain the most common combo on Alistar, the Headbutt>Pulverize combo. Most players know how to perform this combo and it is quite simple. You use Headbutt on an enemy when you are in range of them and then you mash Q, so basically something like this: W>QQQQQQQQ. I however only press Q once because I like to have a working Q button (It won't break, take it easy) and I'm not much of a QQer.

Everyone fails this combo from time to time and so do I but mostly when I fail it is not because I press Q too late. It's because I press Q too soon so that the Pulverize animation is completed before the Headbutt animation, making it so that I knock my target up and THEN I knock them back. Most games I land every single combo but I feel like I should never fail one at all, but we're all human, right?

>Pulverize (Used to initiate fights or catching someone when you don't have to mana for W or just to position yourself for a 2/3/4/5-man Pulverize)

>Headbutt (Used to push someone into a wall or into your team, make sure not to push an assassin into your carry T_T)

>Pulverize>Headbutt (Catch someone off-guard and pushing them into your team, don't use this if their tank is overextended, only use if you can catch one or more important targets)

>Headbutt>Pulverize (If you are just out of range for Headbutt on an enemy carry or the whole enemy team and you know that your team will follow up and win the fight. Or if you're fed as heck and will instagib someone by doing this)

>Triumphant Roar (Used to save people, I actually do this relatively often)

>Unbreakable Will (Used to block for example Caitlyn's ult while low on HP, you probably won't use this very often)

You can even Headbutt someone into his team from behind and then >Pulverize everyone.

Don't forget that you can  away from danger!

I might get some pictures up but do not expect anything.

NOTE: These combos have nothing to do with if you are jungling or not, they are for Alistar in general.

In the YouTube-link below you can see how Chauster Pulverizes four people and ults right when he starts taking damage, tanking all the turret damage for his team. He waits with his  until he finds a good opportunity to use it instead of just randomly using  to get in range of someone as he could just walk up the enemy team and Pulverize almost all of them. Then he >Headbutts Crumbzz' Udyr and Pulverizes Locust's Soraka, securing kills on both of them. 
http://www.youtube.com/watch?v=tC9kLI6LHwc&lc=4pJBpKjTe0xKML7XOyw-LFXXW5fwsWEdYzBTAtj3fUY&feature=inbox

Chauster is one of the best Alistar players along with Reep, Lilballz and Xpecial. Check them out for inspiration and to learn more. One thing to think about though is that Chauster and Xpecial plays Alistar as support and not jungle but you may learn a lot about how to teamfight by watching gameplays by them. Watch Reep's stream if you want to see him wreck low ELO players with jungle Alistar while building similar to me, you can find him on own3d.tv/Reep. I don't know if Lilballz streams but just as an example of how good he is here's a YouTube-link, watch the Headbutt>Pulverize at the start. 
http://www.youtube.com/watch?v=nTv3mlGC0k8

Here's a Youtube-link of the best Alistar bait ever by Xpecial.
http://www.youtube.com/watch?v=CZcwaJ3k2og

You can ask me anything regarding Alistar and/or this guide in the comment-section.

Constructive criticism is appreciated.

Keep in mind this is my first guide ever.

Have fun playing Moohammad Ali!