For Malamar, try 1 copy of UNM Hoopa or ULP Weavile, which usually can kill Giratinas and other Dark-weak Pokemon. Weavile can also deal with larger threats. For Pokemon with a psychic weakness, like MewMew, try a 3-3 line of Naganadel GX, with a 2/1 split between FRBL Naganadel GX and UNM...