A lot of people, including me, found the Bulky Arcanine set very successful. This is the same set Light introduced but forgot to post a Peer Edit about, so I'm going to do it for him.
www.smogon.com/dp/pokemon/arcanine
[SET]
name: Pepper the Bulky Canine
move 1: Will-O-Wisp
move 2: Hidden Power Ground
move 3: Flamethrower / Fire Blast
move 4: Roar
item: Leftovers
ability: Intimidate
nature: Bold
evs: 240 HP / 168 Def / 28 SpA / 72 Spe
ivs: 30 SpD / 30 SpA
[SET COMMENTS]
<p> Bulky Arcanine is not something to laugh at since it can counter a lot of the major physical threats in the OU metagame thanks to Intimidate. The EVs above ensure that you survive a variety of physical attacks from Pokemon like Choice Band Jolly Dugtrio, and Jolly Garchomp. A Jolly Garchomp can not even OHKO Arcanine with Earthquake. The Speed EVs ensure you outspeed Jolly Tyranitar and other Pokemon who EV to outspeed Jolly Tyranitar by one point.</p>
<p> Will-O-Wisp is probably the most important move here, since the ability to cut the opponents Attack in half is key to this set. Using this move on a wall also limits the durability they have, which will be needed sooner or later. Hidden Power Ground is needed to combat and 2HKO Fire-type threats that are immune to Will-o-Wisp such as Heatran and Infernape. The Fire-type move is your choice. Flamethrower is for reliability, while Fire Blast may be used for the extra kick. Roar is used to scout, cause some damage from Spikes or Stealth Rock if you set them up, and abuse Leftovers. </p>
<p> The EVs are very specific on this type of Arcanine, as the HP and Defense EVs will maximize defensive capabilities while still 2HKOing Heatran and Infernape and being able to outspeed Jolly Tyranitar plus those that aim to outspeed Jolly Tyranitar by a single point. This is very important as you will be able to further diminish Tyranitar's Attack with Will-o-Wisp before it can hit you with an Earthquake, which (with the suggested HP and Defense EVs) won't KO anyways.</p>
www.smogon.com/dp/pokemon/arcanine
[SET]
name: Pepper the Bulky Canine
move 1: Will-O-Wisp
move 2: Hidden Power Ground
move 3: Flamethrower / Fire Blast
move 4: Roar
item: Leftovers
ability: Intimidate
nature: Bold
evs: 240 HP / 168 Def / 28 SpA / 72 Spe
ivs: 30 SpD / 30 SpA
[SET COMMENTS]
<p> Bulky Arcanine is not something to laugh at since it can counter a lot of the major physical threats in the OU metagame thanks to Intimidate. The EVs above ensure that you survive a variety of physical attacks from Pokemon like Choice Band Jolly Dugtrio, and Jolly Garchomp. A Jolly Garchomp can not even OHKO Arcanine with Earthquake. The Speed EVs ensure you outspeed Jolly Tyranitar and other Pokemon who EV to outspeed Jolly Tyranitar by one point.</p>
<p> Will-O-Wisp is probably the most important move here, since the ability to cut the opponents Attack in half is key to this set. Using this move on a wall also limits the durability they have, which will be needed sooner or later. Hidden Power Ground is needed to combat and 2HKO Fire-type threats that are immune to Will-o-Wisp such as Heatran and Infernape. The Fire-type move is your choice. Flamethrower is for reliability, while Fire Blast may be used for the extra kick. Roar is used to scout, cause some damage from Spikes or Stealth Rock if you set them up, and abuse Leftovers. </p>
<p> The EVs are very specific on this type of Arcanine, as the HP and Defense EVs will maximize defensive capabilities while still 2HKOing Heatran and Infernape and being able to outspeed Jolly Tyranitar plus those that aim to outspeed Jolly Tyranitar by a single point. This is very important as you will be able to further diminish Tyranitar's Attack with Will-o-Wisp before it can hit you with an Earthquake, which (with the suggested HP and Defense EVs) won't KO anyways.</p>