[quote=@Alder]
<Snipped quote by Sho Minazuki>

[img]http://i.imgur.com/TxQdz4d.png[/img]

It really just varies from story to story. Here, they use a cube to transmit the data.
[/quote]

Pokemon as a series has a strange relationship with Science. Like in the Pokemon World, there's effortless teleportation, reviving long dead species of Pokemon back from the dead with only fossil remains, and Pokeball's as a whole is a miracle of storage. I think using a cube to transfer data to a Pokemon's Brain is one of the less strange things in that world, I mean, there are suits that can withstand the harshness of outer space that wasn't meant for outer space.