you have to have the yellow pink and purple set or if you don't have that set you have to get more emblems until it appears in the black market
Collect a lot of emblems
20
As you collect emblems new eggs and other various things will surface in the black market shop (the locker in the kindergarden). A purple egg will be among them.
gold egg
You need to have at least iver 25 emblems to get a green egg in sonic adventure 2 battle
No
yes
in sonic rush blaze met him at the end of the battle in death egg
Get a lot of emblems
Collect emblems
You have to buy it
Collect emblems