Hmm... good point. Yeah, i did that too in the past, but now that i know the pain of a breeder, i'm only ask for mons occasionally.
And even some new players asked for pseudos, especially dragon pseudos which is makes me sad . I mean c'mon, you can choose torchic, the most broken starter ever that will make your gameplay smooth as butter. And it won't take long before you'll start to get access to other broken mons as well .
But on the other hand, i agree with @GS BALL. If you're doing a monotype run, as long as you won't do anything that's "cheating", it'll be fun for you, as you'll need your brains to fight some of the gym leaders that have your team weakness' mons.