GokuRikaku
Derp
Ash's Pikachu doesn't have captured at location data, it has "Apparently had a fateful encounter at level 50"
Unless sending it over to Black/White screws up how the information is written
It's actually location data says "Pokémon Event"
To let you know what it says on the status screen on a event Pokemon, using my Pichu from Gamestop for an example:
Jolly nature.
3/9/2011
Sinnoh
Appearently arrived at Lv. 30.
Fateful encounter.
Somewhat of a clown.
This is the same for almost everything that I have that came from an event, however the beasts has something different. "Had a fateful encounter at a special place."
But thats a special Pokemon. At the end, it should say "Sinnoh/Johto" when sent from Gen4 to Gen5.