These are the items you'll be given by Professor Oak on your journey.
The Zero-One
Your beautiful ship, given to you by the
oh-so-kind Professor Oak. It can fly and float, as well as drive, making it
extraordinarily useful. After you find the alternate exit to the Valley,
he'll reward you with the Dash engine. This is used by holding the R button,
and is great for catching up with distant Pokémon.
Pokémon Food
This very healthy food has quite a few uses -
it can be used to lure Pokémon, feed Pokémon, and whack Pokémon on the
head. Aim it with the control stick and throw it with the A button. You'll get
it after you accumulate 14,000 points.
Pester Balls
Looks reminiscent of a Pokéball, but contains
insecticide (or something of the sort.) Doesn't kill Pokémon, but
annoys them, sometimes inciting them into performing odd stunts. Knocks
some Pokémon out.
Poké Flute
Another gift from Professor Oak. Makes Pokémon
dance, thundershock, hatch and the like. It's played with the C-Down button, and you receive it after you accumulate 130,000 points and take at least one photograph of a
Pokémon sign.