This is for those of you that got platinum or any other pokemon game for the first time. 
I'm going to treat it like a Q&A.

Q: What is pokemon
A: Pokemon is a turn based RPG (short for role playing game) with a lot of extra stuff in
it

Q: what starter should I pick
A: That depends, Trutwig and Chimchar are good for offensive people while Piplup is good
for defensive people

Q: how many pokemon are there
A: there are 493 different species...for now

Q: My pokemon won't evolve! why is that
A: some pokemon don't evolve by leveling up,  some need stones, others need to be traded,
others need to love you

Q: love me what do you mean
A: I mean have a high friendship level with you.

Q: how do i do that
A: level it up, walk with it in your party, other things help too, but most importantly,
DON'T LET IT'S HP GO DOWN TO 0!

Q: what the heck! why is that pokemon sparkling and different colored!
A: That, my friend is a shiny pokemon.   those are SERIOUSLY rare. the chances of getting
one are 1 in over 8000.

Q: Pokerus! My pokemon have Pokerus! It's a virus!!
A: don't panic, rejoice! Pokerus is good, it lets you raise your pokemon to raise a
Pokemon's stats better.

Q: what level should my pokemon be before challenging the elite 4 and the champion
A: I recommend level 55 or higher, the champion's pokemon has 3 pokemon at level 58, 2
pokemon at level 60, and 1 pokemon at level 62

Q: what pokemon does the champion have
A: they are Spiritomb, Togekiss, Lucario, Garchomp, Roserade, and Milotic

Q: is there anything after beating the champ
A: yes, there is a TON of stuff but I'm not telling you because that's stuff for you to
find out

Q: what types do the other elite four use
A: the first one uses bug types, (though one is a dark-poison combo) the second uses
ground types  (use gras and water types) the third uses fire types (and all but flareon
have moves that are bad to water types) and the fourth uses psychic types (one is
steel-psychic and one is fighting-psychic)

Q: I keep getting skull (or armor) fossils underground, why is that
A: what you find underground is determined by the last digit on your trainer ID, if it's
odd, you get skull fossils, if it's even, you get armor fossils.

final Q: will you be my friend on wifi
final A: sorry, I don't have wifi at my home.