Anyways, So this if my first guide that I have ever created.(Hopefully not the last either.) I am currently Silver 5 so I probably don't know as much about that game as others. However, hopefully you will be able to overlook that and just use the guide.
Sincerely,
Pyloy7

Pros [-]Strong Early Game [-]Good poke [-]Good escape [-]Hits stride in the mid game [-]Very unpredictable [-]Very Mobile

Cons [-]Falls off Hard Late game [-]Loses to all in champs [-]Somewhat Squishy early game

This will be a quick breakdown of why you should grab Flash and Teleport. The other viable combination is Flash and Ignite. The chief reason you don't grab any of the other summoner spells is because that they really have no point. To start off with, you don't need Ghost because you have an insanely fast movement speed anyway. You don't grab Heal because you shouldn't be taking much damage from poking,and you can wait out for Mega Gnar to get health. Barrier is really only useful when you are fighting 1v1, And you should only really do that as Mega Gnar. Exhaust Its really only good if you are trying to block assassins.

Early/Laning Phase

Gnar does extremely well during the Laning Phase. With his Boomerang Throw he can poke from a long distance and still get farm. He has good escapes if someone tries to gank, and he can usually scare away the enemy champion with his Mega-Gnar form. If he need to secure a kill, a good Boulder Toss will slow them, or a long range Boomerang Throw.

Mid/Roaming Phase

Gnar really hits his stride in the mid game. He has just gotten his Phantom Dancer and probably already has his Boots of Swiftness so hes able to run between lanes extremely quickly. He can usually find a pick and kite them until they die or smash them as Mega Gnar.

Late/Teamfight Phase

By far, its Gnar weakest phase. He falls off hard and kinda becomes a piece of loose flesh. Everyone has about full build and Gnar doesn't have the potential to pick successfully anymore. While he still has the potential to chase, if someone else pops up, hes basically dead.

- Try to stay behind your minions as you farm. It helps against champions that like to go in on you.
- Use your Boomerang Throw to farm minions if you are scared.
- Try to avoid turning into Mega Gnar. After you turn back into Mini Gnar, your lane opponents will probably go extremely aggressive.
- Your lvl 1 Hyper will usually kill minions on the third AA. Try to use that to your advantage.
- Save your Hop for escaping. If you run past the opposing top laner, you can Hop on their head back towards your own tower.
- Don't overextend if your Hop is down. You are very squishy as Mini Gnar and can get melted quite quickly.

So, as Gnar, you do extremely well when your team is grabbing most of the attention. In the beginning of team fights, you probably will have almost no rage. Your goal will be to AA the high priority champions and Boomerang Throw them, saving your Hop for engages. Once you reach full rage, you want to Hop on the fight, which should place you behind them. From there, you want to GNAR! them into the rest of your team. From this position, you can slow people with Boulder Toss, stun them with Wallop, and Crunch to catch anyone who gets past you. When you turn back into mini, you will have a huge speed boost to let you chase down champions or escape if the fight went badly.

This is my first build, so, don't rate it too harshly. I will try to expand on this and it is still a WIP. I will try to get Ranked stats up after the playing of Gnar dies down a bit. Anyways, See you all again!