sorry for having kept you wait but I had to do some research:
- Do he has to apply asylum in germany or what else he can do?
- We need a lawyer to fight for my brother and his rights and
- who did all this to him They have to pay a fine
As for question one:
He should not apply for asylum, he will be rejected due to Dublin Regulations and send back to Greece. The best way is the family unification through the Embassy, that he has already started with.
The Ausländerbehörde has to accept the Refugee Passport from Greece as it is regulated by the Geneva Convention on the Status of Refugees under Article 28:
"2. Travel documents issued to refugees under previous international agreements by parties thereto shall be recognized and treated by the Contracting States in the same way as if they had been issued pursuant to this article."
Germany is a contracting party and Greece aswell, therefore the Ausländerbehörde cannot deny you the status on the ground of the passport.
In regards to your second question:
The best way would be to get a lawyer in Germany, through the partner of your brother.
In regards to your third question:
If you want the authoroties to pay fine, you need to claim a case against them in the court, but if it will be successful is not foreseeable.
I hope we could help you, I wish you and your family good luck. If you have further questions, please do not hesitate to contact us on the platform.