For the lucky folk with a copy of Sonic Advance 1 and/or 2 who can attend the World Hobby Fair, Sonic Team has some rare Chao and nice merchandise for you, as well as a contest and photo op…
Besides exhibiting Sonic Mega Collection, Sonic Advance 2, Sonic Adventure DX, and Sonic Pinball Party, Sonic Team will be giving lucky attendants of the show downloads of the rare Shiny Sonic, Shiny Shadow, Knuckles (who was available at another Sonic Team presentation) and Amy Chao which can be uploaded into Sonic Adventure 2: Battle and the upcoming Sonic Adventure DX from either Sonic Advance 1 or 2.
In addition to the above, there will be a Sonic Advance 2 contest among attendees. To the winner will go a Sonic Silver Medal and Sonic Air Emblem.
Also, those in attendence will receive Sonic Mega Collection / Advance 2 combo tote bags and have the opportunity to take pictures with Sonic and Cream!
Source: Sonic Team’s (Japanese) Page on the World Hobby Fair