おうぶくろむささびであれば
大袋鼯鼠であれば
ōbuku romusasabideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of おおふくろももんが

1. If it is a giant flying squirrel; Assuming it is a giant flying squirrel

Ba Conditional
Usually Written in Kana