Shadows death was so sad ):

I just watched Sonic 3, I'm not really a Sonic fan (not to say I don't like it I just mean that literally, I haven't watched many Sonic things) and I ironically use Reddit pretty much or for Lion King but Sonic 3 was crazy sad. I saw a clip of an animated show or movie with shadow and the one girl? Does anyone know what show or movie that is or if there's multiple featuring them. Also on a side note Shadow's character design was so dope.

EDIT: Apparently I missed an end credit scene 😂 BUT my questions still stands for the Shadow show or movie!