MonoMart is a retail chain with at least one location in Pioneer City.[c11p9]
Pandora and Isabelle are shown carrying MonoMart shopping bags with groceries in them.[c11p0]
The store's slogan is "your only choice."[c11p11] The shopping bags have the Monopolith logo,[c11p0] and an out-of-comic sticker sheet shows that Monopolith uses the same slogan.[SemiCanon]
As of Chapter 11, it has not been confirmed whether MonoMart is actually owned by Monopolith, nor whether it is owned by the same company as Monobank.