theSLAYER

This gift was distributed at the Gotta catch 'em all! STATION in Pokémon Center New York between September 29 to October 3, 2003.

This gift was distributed at the Gotta catch 'em all! STATION in Pokémon Center New York between September 29 to October 3, 2003.

This gift was distributed at the Gotta catch 'em all! STATION in Pokémon Center New York on December 25, 2003.

This gift was distributed at the Gotta catch 'em all! STATION in Pokémon Center New York on December 25, 2003.
This Pokémon was identified and contributed by @HaxAras!

This gift was distributed at the Gotta catch 'em all! STATION in Pokémon Center New York on December 25, 2003.
This Pokémon was identified and contributed by @HaxAras!

This gift is one of the top ten Pokémon selected via poll and distributed, to commemorate Pokémon's 10th Anniversary.
Players get to receive one of these Pokémon when they attend the location that the tour stops at, scattered throughout Europe.
 Species   Suicune   Nickname   (default, save lang)   OT   10ANNIV   TID   06227   Distribution   Distribution Device   Location   (Fateful Encounter)   Dates   (Various)   PID   Cannot Be Shiny   Games   RSE FRLG    Lv. 70      Nature   Random   Ability   Pressure (1 or 2)   Item   None      Moves       Gust   Aurora Beam   Mist   Mirror Coat

This gift is one of the top ten Pokémon selected via poll and distributed, to commemorate Pokémon's 10th Anniversary.
Players get to receive one of these Pokémon when they attend the location that the tour stops at, scattered throughout Europe.
 Species   Raikou   Nickname   (default, save lang)   OT   10ANNIV   TID   06227   Distribution   Distribution Device   Location   (Fateful Encounter)   Dates   (Various)   PID   Cannot Be Shiny   Games   RSE FRLG    Lv. 70      Nature   Random   Ability   Pressure (1 or 2)   Item   None      Moves       Quick Attack   Spark   Reflect   Crunch

This gift is one of the top ten Pokémon selected via poll and distributed, to commemorate Pokémon's 10th Anniversary.
Players get to receive one of these Pokémon when they attend the location that the tour stops at, scattered throughout Europe.

This gift is one of the top ten Pokémon selected via poll and distributed, to commemorate Pokémon's 10th Anniversary.
Players get to receive one of these Pokémon when they attend the location that the tour stops at, scattered throughout Europe.

This gift is one of the top ten Pokémon selected via poll and distributed, to commemorate Pokémon's 10th Anniversary.
Players get to receive one of these Pokémon when they attend the location that the tour stops at, scattered throughout Europe.
 Species   Latios   Nickname   (default, save lang)   OT   10ANNIV   TID   06227   Distribution   Distribution Device   Location   (Fateful Encounter)   Dates   (Various)   PID   Cannot Be Shiny   Games   RSE FRLG    Lv. 100      Nature   Random   Ability   Levitate (1 or 2)   Item   None      Moves       Luster Purge   Psychic   Recover   Dragon Dance

This gift is one of the top ten Pokémon selected via poll and distributed, to commemorate Pokémon's 10th Anniversary.
Players get to receive one of these Pokémon when they attend the location that the tour stops at, scattered throughout Europe.

This gift is one of the top ten Pokémon selected via poll and distributed, to commemorate Pokémon's 10th Anniversary.
Players get to receive one of these Pokémon when they attend the location that the tour stops at, scattered throughout Europe.

This gift is one of the top ten Pokémon selected via poll and distributed, to commemorate Pokémon's 10th Anniversary.
Players get to receive one of these Pokémon when they attend the location that the tour stops at, scattered throughout Europe.
 Species   Entei   Nickname   (default, save lang)   OT   10ANNIV   TID   06227   Distribution   Distribution Device   Location   (Fateful Encounter)   Dates   (Various)   PID   Cannot Be Shiny   Games   RSE FRLG    Lv. 70      Nature   Random   Ability   Pressure (1 or 2)   Item   None      Moves       Fire Spin   Stomp   Flamethrower   Swagger

This gift is one of the top ten Pokémon selected via poll and distributed, to commemorate Pokémon's 10th Anniversary.
Players get to receive one of these Pokémon when they attend the location that the tour stops at, scattered throughout Europe.

This gift is one of the top ten Pokémon selected via poll and distributed, to commemorate Pokémon's 10th Anniversary.
Players get to receive one of these Pokémon when they attend the location that the tour stops at, scattered throughout Europe.

This gift was distributed to players who attended the Party of the Decade at Bryant Park, New York, back in 2006,
to commemorate the 10th anniversary of Pokémon (based on the original Japanese release).  
While this gift is similar to the Journey Across America version, with the Original Trainer being 10 ANIV,
the Trainer ID is 06808 (signifying the event date 2006 August 8.) instead of the TID of 00010.

This gift was distributed to players who attended the Party of the Decade at Bryant Park, New York, back in 2006,
to commemorate the 10th anniversary of Pokémon (based on the original Japanese release).  
While this gift is similar to the Journey Across America version, with the Original Trainer being 10 ANIV,
the Trainer ID is 06808 (signifying the event date 2006 August 8.) instead of the TID of 00010.

This gift was distributed to players who attended the Party of the Decade at Bryant Park, New York, back in 2006,
to commemorate the 10th anniversary of Pokémon (based on the original Japanese release).  
While this gift is similar to the Journey Across America version, with the Original Trainer being 10 ANIV,
the Trainer ID is 06808 (signifying the event date 2006 August 8.) instead of the TID of 00010.

This gift was distributed to players who attended the Party of the Decade at Bryant Park, New York, back in 2006,
to commemorate the 10th anniversary of Pokémon (based on the original Japanese release).  
While this gift is similar to the Journey Across America version, with the Original Trainer being 10 ANIV,
the Trainer ID is 06808 (signifying the event date 2006 August 8.) instead of the TID of 00010.

This gift was distributed to players who attended the Party of the Decade at Bryant Park, New York, back in 2006,
to commemorate the 10th anniversary of Pokémon (based on the original Japanese release).  
While this gift is similar to the Journey Across America version, with the Original Trainer being 10 ANIV,
the Trainer ID is 06808 (signifying the event date 2006 August 8.) instead of the TID of 00010.

This gift was distributed to players who attended the Party of the Decade at Bryant Park, New York, back in 2006,
to commemorate the 10th anniversary of Pokémon (based on the original Japanese release).  
While this gift is similar to the Journey Across America version, with the Original Trainer being 10 ANIV,
the Trainer ID is 06808 (signifying the event date 2006 August 8.) instead of the TID of 00010.

This gift was distributed to players who attended the Party of the Decade at Bryant Park, New York, back in 2006,
to commemorate the 10th anniversary of Pokémon (based on the original Japanese release).  
While this gift is similar to the Journey Across America version, with the Original Trainer being 10 ANIV,
the Trainer ID is 06808 (signifying the event date 2006 August 8.) instead of the TID of 00010.

This gift was distributed to players who attended the Party of the Decade at Bryant Park, New York, back in 2006,
to commemorate the 10th anniversary of Pokémon (based on the original Japanese release).  
While this gift is similar to the Journey Across America version, with the Original Trainer being 10 ANIV,
the Trainer ID is 06808 (signifying the event date 2006 August 8.) instead of the TID of 00010.

Back in December 1999, players are able to obtain a YOSHIRA Mew by trade at Toys R Us stores in the United States, if they were within the first 1500 customers and also caught the Mew on their special "Peel & Win" sticker.

While the DVs are all identical (and not all 15), it can be seen that the Trainer IDs seem to be generated in ascending order.

Huge thanks to @Deoxyz for following up on this and getting it!

THIS POKEMON WILL NOT BE LEGAL WITH ANY VIRTUAL CONSOLE RELEASE
(AND BY EXTENSION, CANNOT BE TRANSFERRED TO GEN 7 AND ONWARD).

Check out the save that was dumped, and the full story here:
 

This gift was distributed to players who won a lucky draw, and could redeem it when they attended the SpaceWorld 1999.
Big thanks to @Afepoke for helping us preserve this rare Mew, as well as his other Japanese Gen I files!
 
Original Thread