A new frozen yogurt place just opened in Catonsville inside the Hanoori (formerly Beseto) shopping plaza in the same shopping center as H Mart. The place is called MangoBerry and is primarily a PinkBerry clone. And yes, they do have mochi topping. Sadly, the name is misleading as they don't have a mango flavored frozen yogurt. They do have a (straw)Berry flavored one. Consistency and taste is different from Mr. Yogato in Fells Point, so you may like this one even if you don't like Mr. Yogato. (And vice-versa.)
There also offer some other interesting items. They have green tea and coffee drinks (served with ice) which we didn't particularly care for. But you can sample the yogurt and drinks. They are particularly nice about samples. Oddly, they also offer "fresh and hot home-made waffles". Most interesting, however, are the shaved ice offerings. This is basically shaved ice, topped with frozen yogurt, mochi, and some toppings. The also have some "specialty" shaved ice offerings like Green Tea and Red-Bean that looked like they may be topped with ice cream. A couple groups who came after us ordered the shaved ice items and we were looking on with curious envy. Like most of these sort of places, prices are a little on the expensive side.