Capture Grimmace
Part of Halloween: open only while the event runs, from its wave 3.
What to do
- Capture
Grimmace. - While this quest is open,
Grimmace turns up in battles at Heavenly Greens Cemetery (Sunshire) (often), at its own level. - Weaken it first: the lower its HP, the better the chance. A Master Seed always works.