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You just aren't doing it right, OP
Step 1. Put up something breedable of value, past gen starters or something. Doesn't have to be perfect, even breeding rejects can work.
Step 2. Ask for what you want
Step 3. Let time takes it natural course
Step 4. If it works you get your new mon, if not then be patient or try something different.
I did it with Darumakas to be fair but they still raked in what I needed.