big spoilers...

the final six mamodo is revealed in the manga.
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.......
if anyone wants to know. only 3 of 4 of zatch's friend survive

finallist is 4 you all know and two new ones

Zatchbell
Tia/Tio
Umagon/Ponygon
Brago
ClearNote
Goomu

thats right poor kancome is gone t.t
he had some good spells too