Not to experienced with Pokecheck other than trying it out and being successful (with a normal pokemon that is) I just talked to someone about this and the only thing I could dig up was the following:
Q5: How can I deposit a Pokémon holding a gift ribbon on the GTS?
A: No pokémon holding a premier or classic ribbon can be deposited on the GTS. You will find some event pokémon with those ribbons in our database but they were imported from external .pkm files. It is however possible to check the stats of such a Pokémon. Save and upload a battle video featuring the Pokémon on the GTS and use the VS. Player to view its stats, including IVs and EVs.
I'll just list out what I did in steps so it'll be easier to find my (silly) mistakes.
First, I change the primary DNS of the 3ds done through the main menu to match the DNS of Pokecheck.
Then I go to the website and look for the pokemon I want to send over to the cartridge and click "Queue for Download" on the pokemon stats/info page at the bottom.
After that, I'll go to GTS with a full party and I should receive the pkmn but I don't. Am i missing any crucial steps ? Do I have to make any deposit requests (wanted and offered pkmn)
First of all, thanks again for answering my question earlier. Mind if I ask a few questions regarding Pokecheck, that's if you don't mind. I seem to be having a bit of trouble when reaching the GTS and making an offer part. Thanks :D
Sorry, but there isn't anyway for moderators to designate only one person to be allowed to post in a thread. If you're working on a new trade thread, I'd suggest finding an old, hard to find post of yours and edit in your information into it.