i dont think it is possible in time go to darkness for that one
You can only find it on floors B10-B20.
you can't
The Pokemon not in Pokemon mystery dungeon time are Mewtwo, Burmy, Buneary, Lopunny, and Rotom.
Yes
mission recruit or egg
No, The Pokemon U get is different but the story line is the same. Celebi, Lucario, Riolu are only found in time. Mewtwo, rotom are only found in Darkness. There are more so I'll check l8r.
Different Pokemon are available. Time: Celebi Combee Pachirisu Riolu Lucario Darkness: Mewtwo Burmy Buneary Lopunny Rotom
you first have to get to midnight forest after beating darkrai. Bring lots of food. Rotom should appear around B15. :P
at night
8oclock at night
Rotom can only be recruited in Midnight Forest, and it may appear on floors 10 through 20. They don't have a very high recruit rate, though. A Friend Bow may help.
To get Rotom in Pokemon Platinum you must be in the machine at 8:00pm to 12:00pm on Fridays or Saturdays.