I hadn't seen this mentioned before, but the Daycare women at the end states that it's possible to train Yabukuron to not exhale its stench, which was the main problem with it. So, there was some sort of resolution given to why it could stay without major problems, since Yuri was unaware of this. That's a good enough excuse for me, I guess. :P

Meguroco was just treated horribly in this episode; it launched one attack, so everyone gangs up on it?!
It chucked sharp, jagged rocks at preschoolers though...:/