Leviathan_ said:
Gastly knows how to use Mean Look (For those who don't know or remember, Mean Look is an attack that always strikes first and makes the foe unable to flee no matter what).
I wouldn't worry about it. Raikou, being the cheap bastard that he is, also knows roar, which allows him to escape as it makes
your pokémon flee. Oh, and if you change away from the pokémon that used mean look, Raikou can flee again.
Also, a number or red dead redemption fails would make this list for me. Too many of them for me to go into...
My own pokémon fail, however, would be failing to beat the elite 4 because I decided to make my electivire use earthquake against Lance's Gyarados.
Thoughts - "Electivire's an electric pokémon, it'll destroy Gyarados. Any electric move should work. Don't use earthquake"
*Attacks*
"Why the hell did I use earthquake? Dammit brain, that's exactly what I told you not to do!"