How many mystery gifts can I keep in Pokemon Diamond at once?

Dave P.: How many mystery gifts can I keep in Pokemon Diamond at once?
I’m having someone download mystery gifts for me, but they’ve never really played Pokemon before. How many mystery gifts can be downloaded into the game without first visiting the man in the Pokemart? Or will the man in the Pokemart stay in the Pokemart until I talk to him X amount of times for X amount of gifts downloaded.

For example, I want my friend to download the Entei, Suicune, and Celebi events. Will they be able to download all three of them without ever entering the Pokemart?

Answers and Views:

Answer by MattM
Yes, that would be possible if you just want the Shiny Entei, Shiny Suicune and Celebi events provided you don’t have any other Wonder Cards that you haven’t deleted yet because each event downloads a Wonder Card however if you wanted the Shiny Raikou that was released today then that wouldn’t be possible because there’s a maximum of 3 Wonder Cards allowed however once you pick up a Pokémon from the man in the Poké Mart, it’ll be safe to delete its Wonder Card.

Answer by Fatefinger
You can download them but the issue is you need to pick them up from the pokemart if you wish to download another event. The game can only give you one at a time. So when you get raikou you will have to pick it up, save then in 2 weeks you can download entei and the same goes for the others. Also you can only have 3 mystery gift wonder cards on you save at a time. Meaning at some point you will have to delete a wonder card or 2.

Answer by John Blackwell
The game can only give you one at a time. So when you get raikou you will have to pick it up, save then in 2 weeks you can download entei and the same goes for the others.