So I've been playing a bit with Honchkrow, and he has just been demolishing teams. I've been running a wallbreaker-sweeper setup of Machamp/Heracross/Honchkrow, with the double moxie allowing me to sweep out of nowhere at any time, and Machamp tears through unprepared teams anyway. I must say its been performing excellently, and strategy of 'press attacks whilst not giving a damn' is simple yet effective.
As far as Honchkrow's solo performance, I've found that he can consistently just tear an even slightly wounded team apart. Sucker Punch and Pursuit make some very entertaining mindgames, and make it easy for me to pick up the first Moxie boost, after which the snowball effect takes over.
The set I've been running for Honchkrow is a bit unconventional, but it's really just an all-out 4 attacks beatdown set.
Honchkrow @ Life Orb
EVs: 252 ATK/4 Sp.DEF/252 SPE
Naughty Nature (+ATK - Sp.DEF)
I've been switching between Superpower and Heat Wave, and frankly, I'm not sure what's better. For the moment, I think it's Superpower, since the main steels I want to get past - Registeel, Bronzong, Empoleon - don't take too much from an uninvested Heat Wave, whereas a +1 Superpower might bring down a weakened one. Heat Wave only really helps against Steelix, but you practically never see those. It might give me a stat drop, but the Moxie boost makes up for it, and it's usually worth the power you get. It even lets me run Adamant nature, but that's a minor boost.
I've also been running Support Xatu on my teams, and he does a decent job, but nothing particularly special. Against some teams he just blanks, but against others he can completely shut them down. Good prediction lets me bounce an entry hazard or two, but ultimately the fact that 1) He isn't as bulky as you want him to be and 2) He has no real way to threaten opponents makes him niche at best. Perhaps the Calm Mind or Dual Screens versions are better, but the Support set just does seems to do nothing half the time. That being said, the ability to just wreck stall teams (if you ever see one of those), or even just shut down problematic mons like Sableye makes him worth considering, but not a must-check mon. All in all, he can be good, but isn't my cup of tea, and fits on some specific teams.
Derp. That is all.