Of course, all credits for this Animatic go to Sega and the people behind it.
Sonic x shadow generations: dark beginnings is free on YouTube.
Sonic x shadow generations:dark beginnings episodes are linked below.
https://youtu.be/1s188WNEiqw?si=NMCcRit6oUicmqp2 - shadow and Maria
https://youtu.be/coN_xKNg0rs?si=jnhOwHWgZ-QM6bmL - finding the way
https://youtu.be/A2d9sS-muqI?si=5UB6zbCQz9VkexhG - to the ark
https://youtu.be/8ZK8bse3Quo?si=79i7T68EcPQRwnMR - full animation
If any links are not working you can go to @SonictheHedgehog to find all the episodes.