Where is The EXPN card in Pokemon SoulSilver?

The EXPN card is not a physical item in Pokemon SoulSilver. It's a term used to refer to the "Experience" card that can be found in the Game Corner in Goldenrod City.

Here's how to find it:

1. Go to the Game Corner in Goldenrod City. It's located on the western side of the city, next to the radio tower.

2. Play the slot machines. Use the coins you win from the slot machines to buy various items, including the Experience card.

3. Look for the card with the name "Experience". It will be available for purchase along with other items.

Important note: The Experience card is not actually an item in your inventory. When you buy it, it's immediately used to boost the experience points your Pokemon gain. You can buy multiple Experience cards to multiply the effect.