Go! Eeks!

As with Synerjee, I don't use Pokémon that I've acquired through in-game trades. Traded Pokémon from other live people are so much better♪

On more than one occasion. On one playthrough of Black (a Nuzlocke), I used the Petilil in Nacrene City I traded for a Cottonee. And in White 2 (a Monotype), I traded Petilil for Cottonee, because the Prankster ability is good.

And in my SoulSilver Ground Monotype that i'm doing for the Ultimate, i'm using Rocky, the Onix you get in Violet City for a Bellsprout (I needed a third Pokémon at the time, but that boosted EXP helps because of how pitiful training in HGSS is).

I try to avoid it under most circumstances.

One notable exception would be the Soulsilver randomize nuzlocke I'm doing, and in which the free shuckle I got ended up being a Latios. Yes, "Shuckie the Latios." XD

I only used Muscle the Machop from Silver in order to get by Whitney. That was all...after that I just boxed the poor thing after I evolved it to Machoke.

I would use them if they didn't have those stupid nicknames. If their names were clear then I would use them for the EXP boost!

I would usually get them but I'd never use them. I'd just get them to have them in my Pokedex. Until Minipete came along.

In Black and White, I could never find an Emolga. So when a traded one came along, I was SO happy because it's simply adorable! At first I hated the name but now it's grown on me. I use Minipete in my main team!

I've used the more interesting in-game trades, like Mimien, Zynx, and my personal favorite, Lilil. :) Most in-game trades are for things you can get way later in the game though, and idk...just doesn't seem worth it most of the time. I did use a few of them in last year's Christmas challenge because it revolved around using traded/gift Pokemon. But normally, I don't use them.

I used Shuckie, Rocky and Eeks for a while, but not for very long. They just weren't Pokemon I needed.

i used mimien in my last playthrough of leafgreen. i once used rocky in my playthrough of heartgold and then evolved it into steelix after the league. other than that i only get them for the pokedex

Rocky the Onix was a member of my team for the first 3 gyms or so!
And as far as i know, i used Jynx and Mr.Mime.
ai have used at least 1 of every generation's in-game trades and at least once