Additionally, while Murkrow and Houndour are catchable in Johto via the Safari Zone in Pokémon HeartGold and SoulSilver, the only possible way to get a Slugma before obtaining the National Pokédex in HeartGold and SoulSilver is to receive it from Primo as an Egg - it must otherwise be tra...
HeartGoldSoulSilver Hatch Egg received from Primo at Violet City Route 32, Cliff Edge Gate, Safari Zone (Surfing), Ruins of Alph, Union Cave Cliff CaveMorningDay Safari ZoneNight Pal Park Pond Pokéwalker Beautiful Beach Generation V Black Trade White White Forest (Surfing) Black 2White...