How do u get xplorer kit on pokemon pearl?

Question

in eterna city in the old mans house, i talked to him and he said:

"you've not gone underground yet? To get to the underground tunnels, you need only to use your explorer kit. but yo need to be outside. it cant be used indoors or a cave. now, off you go!"

then what do i do?

Answer 1

WHAT HE SAID

Answer 2

go underground and dig. select it from ur bag as a key item.

Answer 3

You just have to be outside on plain grass or even on the concrete. You can't be indoors or in a cave, though. Go to 'key items' and press use when you click on your explorer kit. You should be underground in no time!!! ^^) Hope this helped!!!