Firstly, I'd have to find a creative way to kill them. After all, I'm starving out in the wilderness and have limited tools to use. I might have to use rocks or drown them somehow. Not trying to be cruel, but you kinda have to kill them before you eat them...
-Pidgeotto: Knock Pidgeotto unconscious by physical force, gut it, remove and bury the head and entrails, roast it over an open fire.
- Stantler: Drop Stantler from a tree out of a Pokéball to knock it out, remove the head, field dress it with rocks or a sheath knife if you have one, flip or hang from sturdy branches to remove the blood, bury the entrails (or leave them for the Mightyena/Poochyena to eat, nothing gets wasted), remove the muscle tissue from the gut, loin, and rump, grind with sharpened and cleaned rocks, make chili within a Dutch oven (provided that you have tinfoil, if not, skewer the meat with a makeshift spear and roast it).
- Magikarp: Kill from lack of oxygen filtration and gut with knife or sharpened rocks beginning from eyes or inside of mouth (Magikarp have very tough scales, traditional gutting is too difficult) and cut OUT to avoid damaging the flesh, remove entrails, or keep them, whatever your preference, strip whatever flesh you can and cook over an open fire, but cook VERY THOROUGHLY, you may contract a disease such as Giardia if not cooked long enough!
That's the kind of stuff you learn out in the wilderness... Lol. It would suck having to eat my own Pokémon, but I guess it would be mandatory for myself and the rest of the team to survive.