Depends if you're on a computer. Usually the space key is located below the bottom row of letter keys.
The card key in Pokemon Heartgold and Soulsilver is located in the Goldenrod Underground.
In Pokémon HeartGold, key items cannot be dropped or sold like regular items. However, some key items can be given to certain NPCs to remove them from your inventory. Alternatively, you can deposit key items in the PC storage system in a Pokémon Center to free up space in your bag. It's important to note that some key items are necessary for game progression and cannot be discarded.
im not sure if there is a thing
Space key
No, not enough space on the card.
The space key is on the keyboard and is the rectangular key in the middle.
In order to get the Card Key in "Pokémon HeartGold," you need to get to the Director who will be in the Underground Tunnel in Goldenrod City after Team Rocket has taken over the Goldenrod Radio Tower. The Director will give you the Card Key which will open up a Card Key door in the Radio Tower which will assist you in defeating Team Rocket.
space key includ key diprision or not
you can find Bill in heartgold and soulsilver, but he will only tell you how much space you have left in your PC Box(he's in Goldenrod city
You need it to open a door to beat Team Rocket and that's all you can do with it.
Press the "#" key. It will give you a space.
I have beaten the game "Pokemon HeartGold", and I'm in the Kanto region now. (also most done with that, by the way). and i can say, you cant get into space. but if i find a way, I'll come back to tell you. hope this helped! btw, I'm a girl. ;D