Battle Moveset

A Good Moveset for Hariyama would have to be this:

Attacks:

Cross Chop / Brick Break
Knock Off
Focus Punch / Rock Slide / Earthquake / Hidden Power [Ghost]
Focus Punch / Rock Slide / Earthquake / Hidden Power [Ghost]

Items Attached:

Leftovers OR
Choice Band

Preferred Nature:

Adamant

Strategy Using Hariyama

All out power set up for Hariyama. Cross Chop or Brick Break depending on your preference, Power vs. Accuracy. Knock Off is an effective method of handling a wall, forcing a solid tank to lose it's Leftovers will make it much easier to handle and makes it's task of countering Hariyama much more difficult. The final move is depending on what environment you're using Hariyama in and what team you have. Focus Punch is purely power (and useful if you lack Cross Chop for a particularly powerful fighting move) and is good to catch Pokémon switching in or setting up. Rock Slide takes out fliers, Earthquake takes out Poisons and HP Ghost takes out Ghosts and Psychics.

Choice Band will give your physical attacks more power but severely hurts your versatility and ability to adapt to new situations, it also harms Hariyama's ability to wall attacks. Leftovers will give Hariyama a consistent HP regeneration at the cost of some power.

Guts vs. Thick Fat is also dependant on your team's set up. If you have a Cleric or something else to take statuses while needing some back up at taking Ice and Fire attacks maybe Thick Fat will better suit you while if you lack a status absorber or cleric you may need Guts to absorb statuses.

EV Corner:

EVs: 12 HP / 144 Atk / 176 Def / 176 SDef
Adamant Nature (+Atk, -SAtk)

With Hariyama's large HP stat it's important to give it EVs to boost it's two defences instead. With this set up it has suitable attack and 200 a piece defences with 27 point Leftover's recovery per turn. If you go with Choice Band the EVs should be shifted to Attack. Some EVs can also be spared to Speed to oturun some of the slower Pokémon.

Other Optional Sets

Hariyama @ Leftovers
Trait: Thick Fat
EVs: 12 HP / 144 Atk / 176 Def / 176 SDef
Adamant Nature (+Atk, -SAtk)
- Brick Break
- Substitute
- Bulk Up
- Rock Slide / Earthquake / Hidden Power [Ghost]

Sub-Bulk Up set up. Set up a Sub and Bulk Up on a physical Pokémon. It works on the same theory that a Sub-CM set works, by the time your opponent catches on to send in a special attacker it'll have to be sacrificed to break the Sub. 84 Speed EVs is worth considering so it can outrun Weezing before it can attack with Will-o-Wisp.

Hariyama @ Leftovers / Chesto Berry
Trait: Thick Fat
EVs: 204 HP / 176 Def / 128 SDef
Careful Nature (+SDef, -SAtk)
- Brick Break
- Belly Drum
- Rock Slide / Earthquake / Hidden Power [Ghost] / Rest
- Rock Slide / Earthquake / Hidden Power [Ghost] / Rest

When you're as slow as Hariyama is pulling off a Belly Drum set is difficult and is restricted to novelty status. Your best bet with Hariyama would be to go for Chesto-Rest, else you'll want some Para support to take out the Pokémon that can take out a lot of Hariyama's HP.

Other Optional Moves

Counter, Whirlwind, Fake Out, Arm Thrust. With Hariyama's huge HP stat Counter does a lot of damage and can be used to great effect with Bulk Up to even handle Flying attacks. Whirlwind can PHaze Pokémon and is unexpected. Fake Out always goes fast and is free damage is exchange for a move-slot and may be worth considering with Choice Band. Arm Thrust can break Subs for what it's worth.

Strategy Against Hariyama

What can and can't counter Hariyama is partially dependant on what moves it uses. If it lacks Earthquake a large majority of Poison types can counter it (Weezing getting a special mention even if Hariyama does have EQ), if it lacks Rock Slide a lot of Flying types can counter it, if it lacks HP Ghost or Rock Slide Gengar and Misdreavus wall it completely. Bulky Psychics can also wall Hariyama with an absence of HP Ghost. Short of Muk and Swalot all Pokémon that try to wall hairy are at risk of losing their hold item. The obvious (OU) Hariyama counters, discounting the problems with what moves are at it's disposal, are: Weezing, Salamence, Gyarados, and Skarmory.

Contest Moveset

A good Contest Moveset for Hariyama would have to be this for the Tough Contest best with Impish, Lax, Relaxed or Bold Nature:

Attacks:

Belly Drum
Rock Smash
Knock Off
Hyper Beacm

Items Attached:

Yellow Scarf

Strategy Using Hariyama

If you do the attacks in this following order you should have very few problems; 1st - Belly drum, 2nd - Rock Smash, 3rd - Belly Drum/Knock off, 4th - Rock smash/Knock off, 5th - Hyper beam

Locations in Games

Ruby/Sapphire/Emerald Victory Road Floor 1 & Basement 1 Colosseum/XD Evolve Makuhita Fire Red/Leaf Green Trade from RSECXD

Animé Appearences

Hariyama has had a few Anime Appearences. First Brawly's Makuhita evolved into one in his Gym Battle with Ash, which Ash then had to train against to defeat in his rematch. After that, Ash's rival Tyson had one and used it in his League Battle against Ash. After that, Ash battled Greta's Hariyama at the Battle Arena: Episode 296: Brave The Wave Episode 306: A Meditite Fight Episode 307: Just One Of The Geysers Episode 407: Choose It Or Lose It Episode 408: A The End Of The Fray Episode 422: Pasta La Vista Episode 426: Battle Arena! Fighting Confrontation!