There are two ways to figure it out:
Occasionally pass by the day-care. If the day-care man is in a different position than usually, then your Pokemon laid an egg.
You can also get an app for your Poketch from a man in the day care. This app will tell whether your Pokemon has laid an egg, and what level both Pokemon are.
You will know because the old man will be standing outside from his house, in Solaceon Town.
you get the manaphy egg in Pokemon rangers and send it into Pokemon diamond or pearl
You get a togepi egg in Pokemon Platinum, not Diamond.
Have two Nintendo DS one have the Pokemon Ranger and one with the Pokemon Diamond. Then go to check egg. Then you have it.
Happiny
It is not possible to get a Lugia egg in Pokemon Diamond. It is generally impossible to get an egg of a Legendary Pokemon the only exceptions being Manaphy and Phione.
Manaphy is obtainable in Pokemon Diamond if you also have a copy of Pokemon Ranger. The game Pokemon Ranger is able to communicate with Pokemon versions; Diamond, Pearl, Platinum, HeartGold and SoulSilver to transfer a Manaphy Egg to them. This Egg can be hatched like any other Pokemon Egg.
happiny
It's Happini.
you cant unfourtanately
You must breed a Monferno or Infernape with a Pokemon to get the chimchar egg.
Riolu is 4 generation Pokemon. You can get egg only in Pokemon Diamond and Pearl
yes the code is 63749982 768364ff