The routes in Pokemon game are a number to tell you where you are and how to get there.
The routes in Pokemon Platinum begin in the 200s.
you can battle them on routes 224 and 230 in platinum
To get Glameow on Pokemon Platinum you will need to trade for one from Pokemon Pearl. In Pokemon Pearl Glameow appears on Routes 218 and 222.
In Routes 225 and 226 using the Pokeradar.
in Pastoria City, Sunyshore City,Pokemon league,routes 213,222,223,224,230.
In Pokemon Platinum Floatzel can be found on Routes 218, 221, 222, 224, and 230. Floatzel is fairly common on those Routes so shouldn't take too long to find one.
There's no such item/pokemon. Do you mean Giratina?
yes, you can find iron in multiple routes.
You have to trade it from Pokemon Pearl. In Pearl, you can get it on Routes 218 and 222. I got the information from Pokemon.marriland.com
You find kricketot on routes 201,202,203,204,205 and 207(morning/night)
On routes 223 and 230, but you MUST FISH USING A SUPER ROD.
For most routes, the pokemon be the same. But a couple of routes will be different compared to diamond/pearl.