Explain: How things work
It's swapped like this
Sonic-Shadow
Tails- Marine
Knuckles- Silver
Amy- Rouge
Blaze- Wave
Cream- Charmy
Espio- Jet
Vector- Storm
Sticks- Tikal
Big- Omega
Yacker- Chip
Eggman- Eggman Nega
Elise- Maria
Dark Gaia- Solaris
Orbot- Cubot
Until now, if there are any new swaps I will tell you.
Wait for the First Chapter!