What happened to Cosmo from Sonic X

Cosmo died because Tails had to kill her with a cannon he had no choice =[

however, in the Japaneese, when sonic returns to the tyfoone and gives the seed to Tails, Tails says "It´s not true. Just a second ago this was Cosmo" so if you are going acording to the japaneese version she was turned into that seed