EGG_GROUP_NONE
EGG_GROUP_MONSTER
EGG_GROUP_WATER_1
EGG_GROUP_BUG
EGG_GROUP_FLYING
EGG_GROUP_FIELD
EGG_GROUP_FAIRY
EGG_GROUP_GRASS
EGG_GROUP_HUMAN_LIKE
EGG_GROUP_WATER_3
EGG_GROUP_MINERAL
EGG_GROUP_AMORPHOUS
EGG_GROUP_WATER_2
EGG_GROUP_DITTO
EGG_GROUP_DRAGON
EGG_GROUP_UNDISCOVERED
