Pokemon_Veteran said:
...the Johto starter eggs all take 5,120 steps to hatch XD.
Here is a list of how many steps each egg type takes:
1280: Magikarp
2560: Azuiril, Clefa, Igglybuff, Pichu, Togepi
3840: Catterpie, Corphish, Geodude, Hoothoot, Volbeat, Illumise, Lediba, Lotad, Nincada, Pidgey, Poocheyna, Rattata, Seedot, Sentret, Shroomish, Skitty, Slakoth, Spearow, Spinirak, Spinda, Tailow, Volbeat, Weedle, Wurmple, Zigzagoon, Zubat
5120: Bulbasaur, Abra, Aipom, Barboach, Bellsprout, Cacnea, Carvanha, Charmander, Chikorita, Chinchou, Clamperl, Corsola, Cubone, Cyndaquil, Delibird, Diglett, Ditto, Doduo, Phanpy, Drowzee, Dunsparce, Ekans, Electrike, Exeggcute, Farfetch'd, Feebas, Gastly, Girafarig, Gligar, Goldeen, Grimer, Growlithe, Gulpin, Hoppip, Horsea, Houndour, Kangaskhan, Kecleon, Koffing, Krabby, Lickitung, Luvdisc, Machop, Magnemite, Makuhita, Mankey, Mareep, Mawile, Meditite, Meowth, Miltank, Minun, Mudkip, Murkrow, Natu, Nidoran M, Nidorna F, Nosepass, Numel, Oddish, Paras, Pineco, Plusle, Poliwag, Ponyta, Porygon, Psyduck, Qwilfish, Ralts, Remoraid, Rhyhorn, Roselia, Seel, Seviper, Shellder, Shuckle, Slowpoke, Slugma, Smeargle, Sneasel, Snorunt, Snubbull, Spheal, Spoink, Squirtle, Stantler, Staryu, Sudowoodo, Sunkern, Swablu, Swinub, Tangela, Tauros, Teddiursa, Tentacool, Torchic, Torkoal, Totodile, Trapinch, Treecko, Voltorb, Vulpix, Whismur, Wingull, Wooper, Wynaut, Yanma, Zangoose
6400: Absol, Castform, Chimecho, Duskull, Elekid, Heracross, Tyrouge, Smoochum, Magby, Misdrevus, Mantine, Mr. Mime, Onix, Pinsir, Sableye, Sandshrew, Scyther, Shuppet, Skarmory, Tropius, Venonat
7680: Anorith, Kabuto, Lileep, Omanite
8960: Aerodactyl, Aaron, Eevee
10240: Bagon, Chancy, Dratini, Lapras, Larvitar, Relicanth, Snorlax, Wailmer
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In Emerald, if you have a pokemon with tha Magma Armor, or the Flame Body ability in your party, the hatch time of eggs is cut in half, but it only works in emerald.