I'mdoing my Ug from Ignou in psychology. Can I pursue my Masters in Germany with ignou ug degree?

Yes, ofcourse you can pursue your Masters in Germany. Your undergrad degree being from IGNOU won’t make a difference here. 

The only requirement that universities abroad mention is that they require candidate’s bachelors degree to be from a recognized university. And IGNOU is definitely a recognized and reputed university. 

Let me know if you want assistance in shortlisting the universities or want any further information from my end.