The same way as diamond and pearl. Go to Jublife city and look for the poketch guy.
no
talking to the clowns in jubilife, getting the vouchers and giving them to a man
You can't get Thunderus in Pokemon Platinum at all. By then when Pokemon Platinum was made, no one knew that Pokemon Black and White were going to be made.
you see all the Pokemon in platinum and trade from your other games like emerald, blue, fire red etc and that is how you find all Pokemon in platinum.
U will never get them all!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
no
You can find articuno in the poketch marking app when he's all around
Here is a guide to tell you how to get all the poketch apps:http://www.serebii.net/platinum/poketch.shtml
talking to the clowns in jubilife, getting the vouchers and giving them to a man
Restart....
there is a app in your poketch that tells you how happy your Pokemon is i forget where to get it though and also if you get a Pokemon over trade or just trade over a Pokemon to a different game and right back for evolution (like haunter)its freindship level will go all the way down.
buy the Pokemon platinum book
There is no cheat for catching all the Pokemon on Pokemon platinum. it's all down to hard work and persistence.
if you mean the harbor inn you need a special pass obtained through a Nintendo event. p.s It gets you darkrai.
no
You can't get Thunderus in Pokemon Platinum at all. By then when Pokemon Platinum was made, no one knew that Pokemon Black and White were going to be made.
you see all the Pokemon in platinum and trade from your other games like emerald, blue, fire red etc and that is how you find all Pokemon in platinum.