train, train and train, keep training dont skip trainers that you dont want to battle, keep training, and trust me you will kill everyone, or buy R4i and you will be able 2 use cheats to kill everyone.
It's fairly easy. Continue to defeat the Pokemon League many, many, many, many times. You will eventually get 999,999 yen. I did it, spent it all, and did it again.
get all of your pokemon to lv 100
Well i find it easy to get a empoleon, magniton, magmar, pikachu, dialga ( palkia, or giritina will do), and a leafeon all above level 50
yes it does... if you have the game catch a solisis, teach it shadowball, get it to level 55-60 and you can defeat 3 of thr elite 4 easy... pick the warter type starter to defeat the 4th one... :)
bring good Pokemon
Defeat all three grunts and then defeat the boss. easy if your starter Pokemon is over level 20.
with electric and fire type Pokemon
Kill them with Fire.
It's not as easy as it was in diamond, there are 250(or something like that)Pokemon in the platinum sinnoh dex. But you just have to SEE the Pokemon, not capture them. First you need to defeat the elite four, you need to see every Pokemon on sinoh region, and nex you go with professor Rowan and he will give it to you. You get it after completing the Pokemon League.
thats easy you cant
no
N's Pokemon change between every battle. He usually has at least one Pokemon that can be found in the area you battle in. Your final battle with N he has :Reshiram,Zoroark,Carracosta,Archeops,Klinklang and Vanilluxe.Trust me, he is easy to defeat.