Well if it was available on DSi ware it would probably 3000 points (Which in real money would be £30) But it isn't available on DSi ware so I don't think it's too much to worry about.
None.
Yes, mainly because there are many more opportunities to get rarer Pokemon that you couldn't get in Pokemon Pearl without cheating.
493
You have to get 10 points.
200 POKEMON 200 POKEMON
110
490
There are 18 Fire Attacks in Pokemon Diamond, Pearl and Platinum.
493
110
there is only 1 region in platinum and that is sinnoh
he's worth 275 points