in this case you need a ditto
ditto will lay an egg with almost anyone.
but a male can not lay an egg.
You need to breed a Male Chatot with a Femal Swellow to have an egg
to get a Riolu egg in Pokemon platinum you have to go to iron island by taking the ferry from Canvalve city then find riley in the cave and battle with her. then at the end she will give you the egg but you must have room in your party.
no you can't find a torchic egg in Pokemon platinum
you get it from an egg in Pokemon platinum
You can not get a Turtwig egg in Pokemon Platinum. But if you breed a Turtwig with a Ditto, then it is possible.
by getting a male and female electabuzz and putting them into the daycare until they make an egg.
Egg Groups in Pokemon Platinum and all other Pokemon games are what determines what Pokemon can breed. For example a male Shinx can breed with a female Ziggagoon cause they are both in the same Egg Group which is Field. Some Pokemon can be in up to two Egg Groups for example Ekans is in the Field and Dragon Egg Groups.
maby,but the only way you can do that is if you trade with somebody a male/female eevee ,make them have the egg.
There are a few ways to obtain an egg in Pokemon Platinum Version. Here they are:Putting a male and female Pokemon in the Daycare that have the same breeding typesPutting a non-legendary Pokemon (excluding Manaphy) with a Ditto in the DaycareObtaining an egg from a NPC (Riley, Cynthia)
Leave a female Pokemon and a male Pokemon in the day care for a long while and then look on your poke'tch day care thingy and there might be an egg Hope you get a egg
No, you cannot get a Dialga Egg in Pokémon Platinum.
It is impossible to get a manaphy egg in Pokemon Platinum without cheats. You either use a cheat or get the egg from Pokemon Ranger: Shadows of Almia.