I will be updating this thread whenever a new Shuten Event Pokemon is released. This is a good place to check to see how to get one or to make sure that the one you're trading for is legit (as legit as hacked Pokemon can be, anyways :p). Although I'll include possible natures, I won't be adding the legal nature/IV combos or the natures of any shinies. This is to prevent people from hacking their own.
Flareon
Event Move: Flare Blitz
Other Moves: Curse/Yawn/Wish
Possible Natures: Hasty/Adamant/Lonely/Naughty/Jolly/Mild/Naive
Given Out: July 6th, 2008
How To Obtain: Was given out on a first-come, first-serve basis. No longer available.
Solrock
Event Move: Morning Sun
Other Moves: Cosmic Power/Heal Block/Rock Slide
Possible Natures: Impish/Calm/Bold
Given Out: July 23rd, 2008
How To Obtain: Was given out on a first-come, first-serve basis. No longer available.
Lunatone
Event Move: Moonlight
Other Moves: Cosmic Power/Heal Block/Psychic
Possible Natures: Modest/Calm/Bold
Given Out: July 23rd, 2008
How To Obtain: Was given out on a first-come, first-serve basis. No longer available.
Seel
Event Move: Calm Mind
Other Moves: Encore/Fake Out/Signal Beam
Possible Natures: Modest/Calm/Bold/Timid
Given Out: September 28th, 2008
How To Obtain: Was given out to participants of the UU Tournament.
Shinx
Event Move: Volt Tackle
Other Moves: Ice Fang/Fire Fang/Howl
Possible Natures: Adamant/Jolly/Impish/Hasty/Naive/Lonely/Naughty
Given Out: October 29th, 2008
How To Obtain: Was given out to participants of the Shoddy Battle Tournament.
Sableye
Event Move: Hypnosis
Other Moves: Trick/Sucker Punch/Moonlight
Possible Natures: Adamant/Bold/Naive
Given Out: October 31st, 2008
How To Obtain: Was given out in honor of Halloween. No longer available.
Banette
Event Move: Focus Punch
Other Moves: Trick/Shadow Sneak/Pursuit
Possible Natures: Adamant/Brave/Jolly/Lonely/Naughty
Given Out: October 31st, 2008
How To Obtain: Was given out in honor of Halloween. No longer available.
Mightyena
Event Move: Superpower
Other Moves: Ice Fang/Thunder Fang/Fire Fang
Possible Natures: Adamant/Jolly
Given Out: November 17th, 2008-Present Day
How To Obtain: Must be won through the lottery (rare).
Shellder
Event Move: Rock Blast
Other Moves: Icicle Spear/Rapid Spin/Clamp
Possible Natures: Adamant/Impish
Given Out: December 19th, 2008
How To Obtain: Was given out to to participants of the Stadium-Style Tournament.
Stantler
Event Move: Heal Bell
Other Moves: Bite/Imprison/Captivate
Possible Natures: Adamant/Impish/Jolly/Modest
Given Out: December 28th, 2008
How To Obtain: Was given out in honor of the holidays. No longer available.
Pidgey
Event Move: Swords Dance
Other Moves: Pursuit/Brave Bird/Return
Possible Natures: Adamant/Jolly
Given Out: January 15th, 2009
How To Obtain: Was given out to participants of the Kanto Tournament. No longer available.
Flareon
Event Move: Flare Blitz
Other Moves: Curse/Yawn/Wish
Possible Natures: Hasty/Adamant/Lonely/Naughty/Jolly/Mild/Naive
Given Out: July 6th, 2008
How To Obtain: Was given out on a first-come, first-serve basis. No longer available.
Solrock
Event Move: Morning Sun
Other Moves: Cosmic Power/Heal Block/Rock Slide
Possible Natures: Impish/Calm/Bold
Given Out: July 23rd, 2008
How To Obtain: Was given out on a first-come, first-serve basis. No longer available.
Lunatone
Event Move: Moonlight
Other Moves: Cosmic Power/Heal Block/Psychic
Possible Natures: Modest/Calm/Bold
Given Out: July 23rd, 2008
How To Obtain: Was given out on a first-come, first-serve basis. No longer available.
Seel
Event Move: Calm Mind
Other Moves: Encore/Fake Out/Signal Beam
Possible Natures: Modest/Calm/Bold/Timid
Given Out: September 28th, 2008
How To Obtain: Was given out to participants of the UU Tournament.
Shinx
Event Move: Volt Tackle
Other Moves: Ice Fang/Fire Fang/Howl
Possible Natures: Adamant/Jolly/Impish/Hasty/Naive/Lonely/Naughty
Given Out: October 29th, 2008
How To Obtain: Was given out to participants of the Shoddy Battle Tournament.
Sableye
Event Move: Hypnosis
Other Moves: Trick/Sucker Punch/Moonlight
Possible Natures: Adamant/Bold/Naive
Given Out: October 31st, 2008
How To Obtain: Was given out in honor of Halloween. No longer available.
Banette
Event Move: Focus Punch
Other Moves: Trick/Shadow Sneak/Pursuit
Possible Natures: Adamant/Brave/Jolly/Lonely/Naughty
Given Out: October 31st, 2008
How To Obtain: Was given out in honor of Halloween. No longer available.
Mightyena
Event Move: Superpower
Other Moves: Ice Fang/Thunder Fang/Fire Fang
Possible Natures: Adamant/Jolly
Given Out: November 17th, 2008-Present Day
How To Obtain: Must be won through the lottery (rare).
Shellder
Event Move: Rock Blast
Other Moves: Icicle Spear/Rapid Spin/Clamp
Possible Natures: Adamant/Impish
Given Out: December 19th, 2008
How To Obtain: Was given out to to participants of the Stadium-Style Tournament.
Stantler
Event Move: Heal Bell
Other Moves: Bite/Imprison/Captivate
Possible Natures: Adamant/Impish/Jolly/Modest
Given Out: December 28th, 2008
How To Obtain: Was given out in honor of the holidays. No longer available.
Pidgey
Event Move: Swords Dance
Other Moves: Pursuit/Brave Bird/Return
Possible Natures: Adamant/Jolly
Given Out: January 15th, 2009
How To Obtain: Was given out to participants of the Kanto Tournament. No longer available.