i think you have to get all the sol and chaos emeralds first to unlock super blaze or
super sonic !!!!!I dont really know let me check BRB!!!!!!!!!

did u beat altitude limit

get all the chaos and sol emeralds then go to the menu character select and you will see a
red dot that will be the part were you work with blaze to defeat eggman and eggman nega
but yu will be in your super forms and its hard to bet them cause they're in giant robots
that shoot lasers and rockets plus blaze is so slow and her moves charge up slow to so its
kinda ***.so there stop crying you little pussys