MSM Breeding Special Monsters
Punkleton: Bowgart to left, T-Rox to the right.
Yool: Deedge to the left, Thumpies to the right.
Schmoochle: Tweedle to the left, Riff to the right.
Blabbit: Spunge to the left, Scups to the right.
It may take a while to get one but you'll get one someday.