Beat this challenge in about a day ^_^. It took a lot more battles than I was hoping for, but since I was using Baton Pass crithax kept setting me back.
(00:51:22) *** Your rank in Standard OU is 68/52018 [1404 points / 158 battles]!
Mr. Mime (M) @ Leftovers
Trait: Soundproof
EVs: 252 HP / 4 Def / 252 SDef
Calm Nature (+SDef, -Atk)
- Magic Coat
- Substitute
- Baton Pass
- Calm Mind
Vaporeon (M) @ Leftovers
Trait: Water Absorb
EVs: 252 HP / 252 Def / 4 SDef
Bold Nature (+Def, -Atk)
- Roar
- Substitute
- Acid Armor
- Baton Pass
Mawile (M) @ Leftovers
Trait: Intimidate
EVs: 252 HP / 204 SDef / 52 Spd
Calm Nature (+SDef, -Atk)
- Stockpile
- Baton Pass
- Substitute
- Taunt
Espeon (M) @ Leftovers
Trait: Magic Bounce
EVs: 252 HP / 252 Def / 4 SDef
Bold Nature (+Def, -Atk)
- Calm Mind
- Stored Power
- Hidden Power [Bug]
- Baton Pass
Ninjask (F) @ Mental Herb
Trait: Speed Boost
EVs: 248 HP / 16 Atk / 220 Def / 24 Spd
Impish Nature (+Def, -SAtk)
- Protect
- Substitute
- X-Scissor
- Baton Pass
Mienshao (F) @ Leftovers
Trait: Regenerator
EVs: 252 HP / 160 Def / 96 SDef
Careful Nature (+SDef, -SAtk)
- Bulk Up
- Drain Punch
- Substitute
- Baton Pass
I had Medicham instead of Mienshao for about 90% of the battles, but the triple psychic typing was just screwing me over against ghost types (and Tyranitar occasionally). My setup is a little slower than most baton pass teams, but I really wanted to have a different team, one that didn't include Smeargle, Gorebyss, and the like. Henceforth, I included Mawile and Medicham/Mienshao. Medicham's set is the most used one in Wifi OU atm if you want to see it.
Here's some logs:
http://pokemon.aesoft.org/replay-Xanderpitz2-vs-Acnologia--2012-04-07
http://pokemon.aesoft.org/replay-Xanderpitz2-vs-Kinder-Pinguin--2012-04-07
http://pokemon.aesoft.org/replay-big-hair-vs-Xanderpitz2--2012-04-07
http://pokemon.aesoft.org/replay-Xanderpitz2-vs-Papita69xxx--2012-04-07