Do you mean Belial? Berial is a character from a video game. If it is indeed Belial you speak of, here's a good source from a reliable site.

http://www.deliriumsrealm.com/delirium/articleview.asp?Post=113

well, I completly agree with you... guess I'll see what the hell this thing is and what it wants

and not the devil may cry firey guy...I doubt that any of those demons exist on any plane

if it's belial and he's reaching through your dreams, don't do any sort of summoning, he's already there you don't need to compound it by calling others. 

he was the demon of vice and avarice, perfect for hedonists, sexual deviants, people who like collecting pretty things and would rather spend their day playing in bedroom sports rather than functioning as a human, using his; specialties to manipulate them into unwholesome actions of the flesh deriving a great amount of pleasurable energy from the resulting confusion of lust, love and uncertainty, keeping the desires alive through dreams.

delirium's realm is an excellent sight for info on specific demons, what's going on  in your life that would be attracting him?  Figure out why he's there then you can work out balancing the issue and sending him off on his merry way.