Need pokemon in pokedex for GTS trades.

Hi everyone! I'd like to trade and then trade back several pokemon so they show up in my pokedex - then I can look for them on the GTS. I'm not looking to keep them!! Mostly looking for the event pokemon that I missed...Deoxys, Jirachi, Manaphy, etc. I can trade my LV 100 Empoleon for the first one (or whatever I have that you think is good as insurance), trade yours back to you as we cycle through some others, and then trade my Empoleon back on the last one. I hope someone is willing to help. Thanks in advance!!