If dark matter is clumping at the center of galaxies that will form super massive black holes. Does dark matter interact with the black hole or its gravity?

When it comes to black holes, dark matter will most likely act like ordinary matter. Once past the event horizon a dark matter particle will stay inside the black hole.

When it comes to black holes, dark matter will most likely act like ordinary matter. Once past the event horizon a dark matter particle will stay inside the black hole.

 

As dark matter approaches the event horizon will it emit/excite any particles? Or would we even be able to detect such a thing?

Also, if there is more dark matter it must clump up into great masses, but do they create there own type of black holes?

Dark matter interactions, except for gravity, are an open question. I don't think anyone could answer your last two questions, except to say there is no evidence of either phenomenon.