Better try a Sybase forum.
We'll only tell you how to migrate from Sybase to SQL 😀
Sybase, Inc. should have some tools for you to actually move the database format from SQL to Sybase.
I wouldn't be surprised if they didn't have simple wizard-y tools because sybase in all honesty is a withering platform due to poor management and business decisions in the past... not necessarily the platform itself.
You might be stuck using BCP. Back when I administered Sybase that's all we had.
Fortunately the migration is usually the other way around and there are lots of tools to help with that.
Good luck.