As there are only 2 sprays, but there are 3 Spotty Bulbears, it is required to lure two together. If you can, lure together all three. This is easier when done in 2-player mode. Squeezing the parents and their offspring together is recommended so that all can be petrified with one bitter spray. The rest should be defeated with the second spray, and spicy sprays are also available to make treasure collection afterwards a quicker affair, if they haven't already been used against the enemies.