This set is a great Physical sweeper commonly referred to (by me...) as Hitmongod.
Hitmonlee @ Liechi Berry
evs: 4 HP / 252 Atk / 252 Spe
Role: Physical Cleaner/Sweeper
What it Does: It's basically an automatic win as long as the opponent has no active priority users or bulky Psychics (or Tangrowth...) above 60-70% health. The purpose of the set is pretty straightforward: Endure a hit at 1%, eat the Liechi Berry to get well over 500 Attack, and activate Unburden to instantly double your Speed. With max Speed and an Adamant nature, Hitmonlee will outspeed everything including Jolly Scarf Archeops, plus Pokemon like Klinklang after a Shift Gear. Once you get down to 1 HP, you now have EdgeQuake coverage plus a 200 Power STAB move AND an attack boost. Basically, you OHKO the metagame with a neutral hit, except for 252/252+ Tangrowth who takes 84% on average. Even Psychic-type Pokemon need high health to stand up to Hitmonlee. Uxie (252/160+) will lose half its health to a Reversal, and 0/0 Mesprit can be OHKO'd with Rocks. Gothitelle without any defensive investment is OHKO'd 100% of the time with Stealth Rock down, but a bulky SubCM set will require some prior damage. Anything else of note will be taken down in one hit. Note that a not very effective Reversal at 1 HP is still stronger than an Earthquake or a Stone Edge, so unless the opponent is a Ghost or Flying-type, it's a good bet to just click the Reversal button. Also slowking sucks.
Good Teammates: You need two things removed in order to sweep with Hitmongod, and those are bulky Psychics and priority users. However, note that the Psychic types do not have to be killed, just weakened. The same goes for super-bulky Pokemon like Tangrowth. There is only one move that guarantees damage on an opponent no matter what, and that's Pursuit. Therefore, Escavalier is a perfect teammate since he can just wreck Psychics with Pursuit, and usually do enough damage whether or not the opponent switches. Remember, a Psychic at 40, even 50% cannot stand up to Hitmonlee, so a weak Pursuit is better than letting the opponent switch. Priority users like Kabutops can be taken out by bulky Pokemon like Uxie or Steelix, who also sets up Stealth Rock that lowers Hitmonlee's checks into KO range. A backup sweeper like Mesprit or Lilligant is a nice addition to a team, as Hitmonlee will almost always get one KO per game, since just about anything will be taken down in two hits from Reversal (as in, nothing can switch in very well).
Additional Comments: Hitmonlee is just plain strong, and the opponent will have a lot of trouble staying out of trouble even if Hitmonlee gets worn down. Remember, Hitmonlee doesn't care about Stealth Rock or Spikes since he shouldn't switch into much and actually prefers lower health to higher. If you predict an attack that can do about 80% or 90% to Hitmonlee and switch the fighter in, the game can be over right there. Mach Punch is acceptable as an out against priority users, but often it's more important to cover Pokemon like Cofagrigus and NIDOQUEEN. Seriously, Nidoqueen is a boss and Hitmonlee kills it. gg.