I would like a step-by-step guide on how I would go about crafting a Pokemon that meets certain requirements. How should I go about catching one? How do I ensure it has the right nature and ability? How do I check its IVs while also leaving it free to be EV trained in the future? How can I ensure that certain important IVs are 31 and not 30 or lower?
For example, let's say I wanted to use a Mienshao that has 31 attack and speed IVs, with Regenerator and an Adamant nature. I currently don't even have a Mienfoo. Where do I begin, and what steps to I take?
I have multiple DSes and access to Black, White, and all 4th generation games, in case that matters.