The parcel is the mail i think

there is two ways to get shaymin on that route.
walk through walls when you reach the big white rock.
here is the walk through walls cheat
tested works I use it all the time.
press r+b at the same time to walk through walls on pokemon platinum only.

94000130 FEFD0000
12060B90 0000E00A
12060BF6 0000E001
12060C94 0000E008
D2000000 00000000

Hope I Helped

i have a non-ar shaymin pretty good that, isn't it? YEEESSS!

When u d-feat all gyms fly STRAIGHT to sandgem town dont do anything when u defeat volkner
just get out of gym.talk 2 an old guy in pokecenter @sandgem and he sez :hav ye heard of
shaymin?.say yes and oak will be @ eterna.talk 2 him and he givs u oak's letter.d-feat
league and get shaymin!!.happy shaymin-ing.

by darcy lock

Is there a way to get those flowers with a pearl cheat shamin?! It is in pokemon platinum
now...

i already beat Volkener :(
and as for the ar dude. i don't have an AR AND i was wondering y they don't get rid of the
stone.

you need an action replay

Can you get it through downloads