I don't know what booklet says but on the game ending credit it reports:
Ogeretsu Kun
Manami Ietel
Yuukichan's Papa
Here's the video >
http://www.youtube.com/watch?v=UiT_3kwgvwQ
Ending credits of others episodes:
Mega Man reports "Chanchacorin Manami & Yuukichan's Papa" >
http://www.youtube.com/watch?v=Kduzi0ZyKjY
Mega Man 3 reports "Bunbun" >
http://www.youtube.com/watch?v=i79I58A2r_g
Mega Man 4 reports "Ojalin & Bunbun" >
http://www.youtube.com/watch?v=YkVWge_H4h4
Mega Man 5 reports "Mari" >
http://www.youtube.com/watch?v=s-7xneX9ZyY
Mega Man 6 reports "Yuko" >
http://www.youtube.com/watch?v=gVCwFBm86hI
If the booklet reports nothing, I suggest to put on notes only composer aliases reported on the games and not their real name (there are respective entry for those).