So:
I started with, say, an Angel, just to keep things simple before I try other creatures (and to fuck around in Adventure Mode). Problem is, it's not showing up in any generated worlds, even when I fixed all the ennerous tags. Here's the creature file:
[CREATURE:ANGEL]
[NAME:angel:angels:angelic]
[TILE:'A'][COLOR:5:0:1]
[SPEED:2000][GRASSTRAMPLE:0]
[FEMALE]
[GENPOWER:3]
[CAN_LEARN][CAN_SPEAK][CAN_CIV]
[trANCES]
[CANOPENDOORS][PET_EXOTIC]
[PREFSTRING:grace]
[PREFSTRING:beauty]
[BODY:HUMANOID_FLIER:2EYES:2EARS:NOSE:2LUNGS:HEART:GUTS:ORGANS:HUMANOID_JOINTS:THROAT:NECK:SPINE:BRAIN:5FINGERS:5TOES:MOUTH]
[MAXAGE:99999999:11111111111111111]
[NARROW]
[CANNOT_UNDEAD]
[FANCIFUL]
[FLIER]
[FIREIMMUNE]
[BUILDINGDESTROYER:2]
[MAGMA_VISION]
[NOFEAR]
[EXTRAVISION]
[NOBREATHE]
[NOSMELLYROT]
[NO_DRINK][NO_SLEEP][NO_EAT][NOEXERT][NOSTUN]
[DAMBLOCK:7777]
[SIZE:7]
[ATTACK:MAIN:BYTYPE:GRASP:slash:slashes:20:200:SLASH][ATTACKFLAG_WITH]
[ATTACK:SECOND:BYTYPE:MOUTH:bite:bites:1:1:GORE][ATTACKFLAG_CANLATCH]
[CHILD:12][BABY:1][MULTIPLE_LITTER_RARE]
[FAT:1]
[EQUIPS]
[CRAFTSMAN_NAME:crafter:crafters]
[FISHERMAN_NAME:fisher:fishers]
[HAMMERMAN_NAME:hammerer:hammerers]
[SPEARMAN_NAME:spearer:spearers]
[CROSSBOWMAN_NAME:markswoman:markswomen]
[AXEMAN_NAME:axe-woman:axe-women]
[SWORDSMAN_NAME:swordswoman:swordswomen]
[MACEMAN_NAME:mace-angel:mace-angels]
[PIKEMAN_NAME:pike-angels:pike-angels]
[BOWMAN_NAME:bowwoman:bowwomen]
[ALL_ACTIVE]
[SPEECH:human_male.txt]
[STANDARD_FLESH]
[HOMEOTHERM:10067]
[SWIMS_INNATE][SWIM_SPEED:6500]
[PERSONALITY:IMAGINATION:88:99:100]
[PERSONALITY:ARTISTIC_INTEREST:98:99:100]
[PERSONALITY:INTELLECTUAL_CURIOSITY:95:99:100]
[PERSONALITY:SELF_DISCIPLINE:70:79::100]
[PERSONALITY:ACTIVITY_LEVEL:90:95:100]
And here's the Entity_Default entry:
[ENTITY:ANGEL]
[CREATURE:ANGEL]
[INDIV_CONTROLLABLE]
[trANSLATION:HUMAN]
[DIGGER:ITEM_WEAPON_SHOVEL]
[WEAPON:ITEM_WEAPON_AXE_WOOD]
[WEAPON:ITEM_WEAPON_BOW]
[AMMO:ITEM_AMMO_ARROWS]
[WEAPON:ITEM_SWORD_LONG_ELVEN]
[TOY:ITEM_TOY_PUZZLEBOX]
[TOY:ITEM_TOY_BOAT]
[INSTRUMENT:ITEM_INSTRUMENT_FLUTE]
[INSTRUMENT:ITEM_INSTRUMENT_HARP]
[INSTRUMENT:ITEM_INSTRUMENT_PICCOLO]
[CLOTHING]
[CURRENCY:COPPER:1]
[CURRENCY:SILVER:5]
[CURRENCY:GOLD:15]
[SELECT_SYMBOL:WAR:NAME_WAR]
[SUBSELECT_SYMBOL:WAR:VIOLENT]
[SELECT_SYMBOL:BATTLE:NAME_BATTLE]
[SUBSELECT_SYMBOL:BATTLE:VIOLENT]
[SELECT_SYMBOL:SIEGE:NAME_SIEGE]
[SUBSELECT_SYMBOL:SIEGE:VIOLENT]
[SELECT_SYMBOL:ROAD:NAME_ROAD]
[SELECT_SYMBOL:TUNNEL:NAME_TUNNEL]
[SELECT_SYMBOL:BRIDGE:NAME_BRIDGE]
[SELECT_SYMBOL:WALL:NAME_WALL]
[SELECT_SYMBOL:REMAINING:NATURE]
[SELECT_SYMBOL:REMAINING:FLOWERY]
[CULL_SYMBOL:ALL:DOMESTIC]
[CULL_SYMBOL:ALL:SUBORDINATE]
[CULL_SYMBOL:ALL:EVIL]
[CULL_SYMBOL:ALL:UNTOWARD]
[CULL_SYMBOL:ALL:NEGATIVE]
[CULL_SYMBOL:ALL:UGLY]
[CULL_SYMBOL:ALL:NEGATOR]
[WOOD_PREF]
[METAL_PREF]
[OUTDOOR_FARMING]
[COMMON_DOMESTIC_PACK]
[USE_GOOD_ANIMALS]
[USE_GOOD_PLANTS]
[USE_GOOD_WOOD]
[USE_ANY_PET_RACE]
[IMPROVED_BOWS]
[INVADERS_IGNORE_NEUTRALS]
[USE_MISC_PROCESSED_WOOD_PRODUCTS]
[EQUIPMENT_IMPROVEMENTS]
[SPHERE_ALIGNMENT:PLANTS:384]
[SPHERE_ALIGNMENT:ANIMALS:384]
[SPHERE_ALIGNMENT:TREES:512]
[ART_FACET_MODIFIER:EVIL:0]
[ART_FACET_MODIFIER:GOOD:384]
[ART_FACET_MODIFIER:OWN_RACE:512]
[ART_IMAGE_ELEMENT_MODIFIER:ITEM:32]
[ART_IMAGE_ELEMENT_MODIFIER:PLANT:384]
[ART_IMAGE_ELEMENT_MODIFIER:TREE:512]
[ITEM_IMPROVEMENT_MODIFIER:SPIKES:0]
[ADVENTURE_TIER:4]
[FRIENDLY_COLOR:2:0:1]
[DEFAULT_SITE_TYPE:TREE_CITY]
[liKES_SITE:TREE_CITY]
[liKES_SITE:CITY]
[TOLERATES_SITE:TREE_CITY]
[TOLERATES_SITE:CAVE_DETAILED]
[LEADER_TYPE:DRUID]
[SITE_LEADER_TYPE:DRUID]
[START_BIOME:ANY_FOREST]
[BIOME_SUPPORT:ANY_LAKE:1]
[BIOME_SUPPORT:ANY_FOREST:3]
[BIOME_SUPPORT:ANY_RIVER:1]
[DIPLOMAT]
[PROGRESS_TRIGGER_POPULATION:10]
[PROGRESS_TRIGGER_PRODUCTION:10]
[PROGRESS_TRIGGER_TRADE:1]
[ACTIVE_SEASON:SPRING]
[AMBUSHER]
[MAX_STARTING_CIV_NUMBER:10]
[START_GROUP_NUMBER:100]
[MAX_POP_NUMBER:30]
[MAX_SITE_POP_NUMBER:30]
[RELIGION:REGIONAL_FORCE]
[WANDERER]
[BEAST_HUNTER]
[SCOUT]
[PERMITTED_JOB:MINER]
[PERMITTED_JOB:CARPENTER]
[PERMITTED_JOB:BOWYER]
[PERMITTED_JOB:WOODCUTTER]
[PERMITTED_JOB:ENGRAVER]
[PERMITTED_JOB:MASON]
[PERMITTED_JOB:ANIMAL_CARETAKER]
[PERMITTED_JOB:ANIMAL_TRAINER]
[PERMITTED_JOB:HUNTER]
[PERMITTED_JOB:TRAPPER]
[PERMITTED_JOB:ANIMAL_DISSECTOR]
[PERMITTED_JOB:FURNACE_OPERATOR]
[PERMITTED_JOB:WEAPONSMITH]
[PERMITTED_JOB:ARMORER]
[PERMITTED_JOB:BLACKSMITH]
[PERMITTED_JOB:METALCRAFTER]
[PERMITTED_JOB:GEM_CUTTER]
[PERMITTED_JOB:GEM_SETTER]
[PERMITTED_JOB:WOODCRAFTER]
[PERMITTED_JOB:STONECRAFTER]
[PERMITTED_JOB:LEATHERWORKER]
[PERMITTED_JOB:BONE_CARVER]
[PERMITTED_JOB:WEAVER]
[PERMITTED_JOB:CLOTHIER]
[PERMITTED_JOB:GLASSMAKER]
[PERMITTED_JOB:STRAND_EXTRACTOR]
[PERMITTED_JOB:FISHERMAN]
[PERMITTED_JOB:FISH_DISSECTOR]
[PERMITTED_JOB:FISH_CLEANER]
[PERMITTED_JOB:CHEESE_MAKER]
[PERMITTED_JOB:MILKER]
[PERMITTED_JOB:COOK]
[PERMITTED_JOB:THRESHER]
[PERMITTED_JOB:MILLER]
[PERMITTED_JOB:BUTCHER]
[PERMITTED_JOB:TANNER]
[PERMITTED_JOB:DYER]
[PERMITTED_JOB:PLANTER]
[PERMITTED_JOB:HERBALIST]
[PERMITTED_JOB:BREWER]
[PERMITTED_JOB:SOAP_MAKER]
[PERMITTED_JOB:POTASH_MAKER]
[PERMITTED_JOB:LYE_MAKER]
[PERMITTED_JOB:WOOD_BURNER]
[PERMITTED_JOB:MECHANIC]
[PERMITTED_JOB:SIEGE_ENGINEER]
[PERMITTED_JOB:SIEGE_OPERATOR]
[PERMITTED_JOB:PUMP_OPERATOR]
[PERMITTED_JOB:CLERK]
[PERMITTED_JOB:ADMINISTRATOR]
[PERMITTED_JOB:TRADER]
[PERMITTED_JOB:ARCHITECT]
[ETHIC:KILL_ENTITY_MEMBER:PUNISH_SERIOUS]
[ETHIC:KILL_NEUTRAL:APPALLING]
[ETHIC:KILL_ENEMY:ACCEPTABLE]
[ETHIC:KILL_ANIMAL:JUSTIFIED_IF_GOOD_REASON]
[ETHIC:KILL_PLANT:ACCEPTABLE]
[ETHIC:TORTURE_AS_EXAMPLE:MISGUIDED]
[ETHIC:TORTURE_FOR_INFORMATION:ACCEPTABLE]
[ETHIC:TORTURE_FOR_FUN:APPALLING]
[ETHIC:TORTURE_ANIMALS:APPALLING]
[ETHIC:TREASON:PUNISH_CAPITAL]
[ETHIC:OATH_BREAKING:JUSTIFIED_IF_EXTREME_REASON]
[ETHIC:LYING:JUSTIFIED_IF_GOOD_REASON]
[ETHIC:VANDALISM:SHUN]
[ETHIC:TRESPASSING:SHUN]
[ETHIC:THEFT:SHUN]
[ETHIC:ASSAULT:PUNISH_EXILE]
[ETHIC:SLAVERY:ACCEPTABLE]
[ETHIC:EAT_SAPIENT_OTHER:APPALLING]
[ETHIC:EAT_SAPIENT_KILL:JUSTIFIED_IF_GOOD_REASON]
[ETHIC:MAKE_TROPHY_SAME_RACE:APPALLING]
[ETHIC:MAKE_TROPHY_SAPIENT:APPALLING]
[ETHIC:MAKE_TROPHY_ANIMAL:SHUN]
Yes, I placed the creature file in a new text file titled creature_new, and the Entity is above the Dwarf, but I don't know if they're affecting anything in worldgen.