why is sally not in any 3D games with sonic

The answer is there already...
But I guess that she doesnt have any powers plays a role in it too.
I have one question. Why do anda hate Amy so much? I know she is a little naive, but hey! she is just a little girl. She'll grow up and change.

They don't want any American Sonic characters in their games

because they dont know about her

It's actually because she's compyright to the Archie comics, if i recall correctly. Hence why the other freedom fighters (Bunnie, Rotor, Antoine, etc) and Scourge and his Supression Squad...characters like that arent in games either. I could be wrong, but im pretty sure that's the reason. Sega didnt create her, Archie did.

Maybe she was set to only comics and satam, atau maybe SEGA had not thought about how to put her in the games

I think she's only intended to be a comic character. Sega may not have any plans of using her in any of the games. They ARE using Amy after all.

sonic has changed since thene they wouldn't look right together amy would get annoyed plus angry mob upset fans

sally sucks but not like amy amy sucks big time