So, I have played for a long time and have a few nice Pokémon from exclusive events no longer offered. Specifically the hidden ability, choose the Pokeball you want it in Chimchar found in the Entralink from the White 2 purchase code, but I want to trade for Pokémon from other people with this same legit Starter in a different Pokeball and get a Piplup with a different Pokeball, and the hidden ability. The options are limited to ask for anything specific, so what can I do to not have to spend days trading newly hatched Chimchars for Piplups in hopes I finally get what I wanted?
You could go to an online trading forum for more specific requests. https://www.reddit.com/r/pokemontrades/ is really active (although a lot of posts now are for LGPE) and has a pretty strict legitimacy policy.