depends on type of pokemon.
Yes. Any Pokemon that you leave at Pokemon Daycare to breed will be returned to you, as long as you pay the daycare fee.
They're just like any other Pokemon *couple*. just wait and get the daycare Pokemon app for your watch in the game.
Yes it can but it will take a long time Andy P. rocks and his sister rocks to
Yes as long as they level up while in the daycare center
No, it would take a long time to reach lvl 100 in the daycare.
You can make any Pokemon (as long as it is not legendary or ungendered) by leaving it in the daycare center with a ditto.
depends on how many steps you take
In Pokemon Diamond and Pearl with two compatible Pokemon in the Pokemon Daycare the game will produce an egg every 256 steps. Pokemon left in daycare must be a male and female unless player is using a ditto which is gender-less.
My answer is based on actual experience: I put a (female)roselia and (male)shroomish in the daycare on ruby, and they had an egg (it hatched as a roselia). However, I put a (female)pikachu and (male)minun in the daycare on emerald, and they didn't have an egg. Hope this helps a little. Sorry for not having a direct answer ;)
Train your Pokemon to level 100 or just keep it in the daycare for an extremely long time.
get two Pokemon and then put them in daycare they have to be male and female and in the same egg group (look it up if you don't know) then cycle around near the daycare and check to see if the daycare lady's husband has moved, if he has moved then your Pokemon have produced an egg, and you merely have to talk to him to receive it. Once you have the egg it will take a while to hatch (precisely how long depends on the species) but if you keep walking around or cycling while it is in your party it will hatch eventually, and you now have a new Pokemon
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