Store each Pokémon's initial hatch counter instead of a step count.

The step counts we had weren't even good estimates.  To hatch an egg
uninterrupted takes (counter + 1) * 255 steps in gen IV; what we had
was counter * 256.

Phione and Manaphy have different counters, as do Croagunk and Toxicroak
for some reason, so they're associated with individual Pokémon now,
rather than entire evolution chains.  Double-checked with Pearl,
Platinum, and SoulSilver; there were no differences between the three,
aside from the alternate forms introduced in Platinum.

pokedex/data/csv/evolution_chains.csv

@@ -1,248 +1,248 @@
-id,growth_rate_id,steps_to_hatch,baby_trigger_item
+id,growth_rate_id,baby_trigger_item
-1,4,5120,
+1,4,
-2,4,5120,
+2,4,
-3,4,5120,
+3,4,
-4,2,3840,
+4,2,
-5,2,3840,
+5,2,
-6,4,3840,
+6,4,
-7,2,3840,
+7,2,
-8,2,3840,
+8,2,
-9,2,5120,
+9,2,
-10,2,2560,
+10,2,
-11,2,5120,
+11,2,
-12,4,5120,
+12,4,
-13,4,5120,
+13,4,
-14,3,2560,
+14,3,
-15,2,5120,
+15,2,
-16,3,2560,
+16,3,
-17,2,3840,
+17,2,
-18,4,5120,
+18,4,
-19,2,5120,
+19,2,
-20,2,5120,
+20,2,
-21,2,5120,
+21,2,
-22,2,5120,
+22,2,
-23,2,5120,
+23,2,
-24,2,5120,
+24,2,
-25,1,5120,
+25,1,
-26,4,5120,
+26,4,
-27,4,5120,
+27,4,
-28,4,5120,
+28,4,
-29,4,5120,
+29,4,
-30,1,5120,
+30,1,
-31,4,3840,
+31,4,
-32,2,5120,
+32,2,
-33,2,5120,
+33,2,
-34,2,5120,
+34,2,
-35,2,5120,
+35,2,
-36,2,5120,
+36,2,
-37,2,5120,
+37,2,
-38,2,5120,
+38,2,
-39,1,5120,
+39,1,
-40,4,5120,
+40,4,
-41,2,6400,
+41,2,
-42,2,5120,
+42,2,
-43,2,5120,
+43,2,
-44,2,5120,
+44,2,
-45,1,5120,
+45,1,
-46,2,5120,
+46,2,
-47,2,6400,
+47,2,
-48,2,5120,
+48,2,
-49,2,5120,
+49,2,
-50,1,5120,
+50,1,
-51,3,10240,Luck Incense
+51,3,Luck Incense
-52,2,5120,
+52,2,
-53,2,5120,
+53,2,
-54,2,5120,
+54,2,
-55,2,5120,
+55,2,
-56,1,5120,
+56,1,
-57,2,6400,Odd Incense
+57,2,Odd Incense
-58,2,6400,
+58,2,
-59,2,6400,
+59,2,
-60,2,6400,
+60,2,
-61,2,6400,
+61,2,
-62,1,6400,
+62,1,
-63,1,5120,
+63,1,
-64,1,1280,
+64,1,
-65,1,10240,
+65,1,
-66,2,5120,
+66,2,
-67,2,8960,
+67,2,
-68,2,5120,
+68,2,
-69,2,7680,
+69,2,
-70,2,7680,
+70,2,
-71,1,8960,
+71,1,
-72,1,10240,Full Incense
+72,1,Full Incense
-73,1,20480,
+73,1,
-74,1,20480,
+74,1,
-75,1,20480,
+75,1,
-76,1,10240,
+76,1,
-77,1,30720,
+77,1,
-78,4,30720,
+78,4,
-79,4,5120,
+79,4,
-80,4,5120,
+80,4,
-81,4,5120,
+81,4,
-82,2,3840,
+82,2,
-83,2,3840,
+83,2,
-84,3,3840,
+84,3,
-85,3,3840,
+85,3,
-86,1,5120,
+86,1,
-87,3,2560,
+87,3,
-88,2,5120,
+88,2,
-89,4,5120,
+89,4,
-90,3,2560,Sea Incense
+90,3,Sea Incense
-91,2,5120,Rock Incense
+91,2,Rock Incense
-92,4,5120,
+92,4,
-93,3,5120,
+93,3,
-94,4,5120,
+94,4,
-95,2,5120,
+95,2,
-96,2,5120,
+96,2,
-97,4,5120,
+97,4,
-98,3,6400,
+98,3,
-99,2,10240,
+99,2,
-100,2,5120,Lax Incense
+100,2,Lax Incense
-101,2,5120,
+101,2,
-102,2,5120,
+102,2,
-103,2,5120,
+103,2,
-104,4,5120,
+104,4,
-105,3,5120,
+105,3,
-106,2,5120,
+106,2,
-107,4,5120,
+107,4,
-108,1,6400,
+108,1,
-109,4,5120,
+109,4,
-110,2,5120,
+110,2,
-111,2,5120,
+111,2,
-112,1,5120,
+112,1,
-113,3,5120,
+113,3,
-114,2,5120,
+114,2,
-115,3,5120,
+115,3,
-116,1,6400,Wave Incense
+116,1,Wave Incense
-117,1,6400,
+117,1,
-118,1,5120,
+118,1,
-119,2,5120,
+119,2,
-120,1,5120,
+120,1,
-121,3,5120,
+121,3,
-122,1,5120,
+122,1,
-123,1,20480,
+123,1,
-124,1,20480,
+124,1,
-125,1,20480,
+125,1,
-126,1,10240,
+126,1,
-127,1,30720,
+127,1,
-128,1,30720,
+128,1,
-129,4,30720,
+129,4,
-130,4,5120,
+130,4,
-131,4,5120,
+131,4,
-132,4,5120,
+132,4,
-133,2,3840,
+133,2,
-134,2,3840,
+134,2,
-135,2,3840,
+135,2,
-136,4,3840,
+136,4,
-137,4,3840,
+137,4,
-138,4,3840,
+138,4,
-139,2,5120,
+139,2,
-140,1,5120,
+140,1,
-141,2,3840,
+141,2,
-142,6,3840,
+142,6,
-143,1,3840,
+143,1,
-144,5,3840,
+144,5,
-145,4,5120,
+145,4,
-146,6,5120,
+146,6,
-147,2,5120,
+147,2,
-148,3,3840,
+148,3,
-149,4,6400,
+149,4,
-150,3,5120,
+150,3,
-151,1,8960,
+151,1,
-152,2,5120,
+152,2,
-153,1,5120,
+153,1,
-154,2,5120,
+154,2,
-155,2,5120,
+155,2,
-156,5,3840,
+156,5,
-157,6,3840,
+157,6,
-158,4,5120,Rose Incense
+158,4,Rose Incense
-159,6,5120,
+159,6,
-160,1,5120,
+160,1,
-161,6,10240,
+161,6,
-162,2,5120,
+162,2,
-163,2,5120,
+163,2,
-164,3,5120,
+164,3,
-165,3,3840,
+165,3,
-166,4,5120,
+166,4,
-167,4,5120,
+167,4,
-168,5,5120,
+168,5,
-169,5,5120,
+169,5,
-170,6,5120,
+170,6,
-171,3,6400,
+171,3,
-172,3,6400,
+172,3,
-173,2,5120,
+173,2,
-174,6,3840,
+174,6,
-175,2,5120,
+175,2,
-176,5,7680,
+176,5,
-177,5,7680,
+177,5,
-178,5,5120,
+178,5,
-179,2,6400,
+179,2,
-180,4,5120,
+180,4,
-181,3,6400,
+181,3,
-182,3,6400,
+182,3,
-183,1,6400,
+183,1,
-184,3,6400,Pure Incense
+184,3,Pure Incense
-185,4,6400,
+185,4,
-186,2,5120,
+186,2,
-187,4,5120,
+187,4,
-188,5,5120,
+188,5,
-189,1,10240,
+189,1,
-190,3,5120,
+190,3,
-191,1,10240,
+191,1,
-192,1,10240,
+192,1,
-193,1,20480,
+193,1,
-194,1,20480,
+194,1,
-195,1,20480,
+195,1,
-196,1,30720,
+196,1,
-197,1,30720,
+197,1,
-198,1,30720,
+198,1,
-199,1,30720,
+199,1,
-200,1,30720,
+200,1,
-201,1,30720,
+201,1,
-202,1,30720,
+202,1,
-203,4,5120,
+203,4,
-204,4,5120,
+204,4,
-205,4,5120,
+205,4,
-206,4,3840,
+206,4,
-207,2,3840,
+207,2,
-208,4,3840,
+208,4,
-209,4,5120,
+209,4,
-211,5,7680,
+211,5,
-212,5,7680,
+212,5,
-213,2,3840,
+213,2,
-214,4,3840,
+214,4,
-215,2,2560,
+215,2,
-216,2,5120,
+216,2,
-217,2,5120,
+217,2,
-218,2,5120,
+218,2,
-219,6,7680,
+219,6,
-220,2,5120,
+220,2,
-221,3,5120,
+221,3,
-223,2,5120,
+223,2,
-224,2,5120,
+224,2,
-228,4,5120,
+228,4,
-229,2,7680,
+229,2,
-230,1,10240,
+230,1,
-232,4,6400,
+232,4,
-233,1,7680,
+233,1,
-234,1,5120,
+234,1,
-235,2,2560,
+235,2,
-236,1,6400,
+236,1,
-237,5,5120,
+237,5,
-239,1,5120,
+239,1,
-240,2,5120,
+240,2,
-241,1,20480,
+241,1,
-242,1,20480,
+242,1,
-243,1,20480,
+243,1,
-244,1,30720,
+244,1,
-245,1,30720,
+245,1,
-246,1,2560,
+246,1,
-247,1,30720,
+247,1,
-248,1,30720,
+248,1,
-249,1,30720,
+249,1,
-250,1,10240,
+250,1,
-251,1,2560,
+251,1,
-252,1,30720,
+252,1,
-253,4,30720,
+253,4,
-254,1,30720,
+254,1,

pokedex/db/tables.py

@@ -177,7 +177,6 @@ class EvolutionChain(TableBase):
     __tablename__ = 'evolution_chains'
     id = Column(Integer, primary_key=True, nullable=False)
     growth_rate_id = Column(Integer, ForeignKey('growth_rates.id'), nullable=False)
-    steps_to_hatch = Column(Integer, nullable=False)
     baby_trigger_item = Column(Unicode(12))
 
 class EvolutionTrigger(TableBase):
@@ -456,6 +455,7 @@ class Pokemon(TableBase):
     base_experience = Column(Integer, nullable=False)
     base_happiness = Column(Integer, nullable=False)
     is_baby = Column(Boolean, nullable=False)
+    hatch_counter = Column(Integer, nullable=False)
     has_gen4_fem_sprite = Column(Boolean, nullable=False)
     has_gen4_fem_back_sprite = Column(Boolean, nullable=False)