It's a horrendous task to even attempt to enforce such an idea over the internet. In reality, it cannot be policed.

At any given time you conduct a trade, you're acknowledging the transfer of ownership of that Pokemon.

It's a fair trade as long as both parties agree to what their trading & accepting. No matter the value.

Threads with any "Re-Distribution" Clause or Restriction may be shut down by discretion of any staff.