Thank you for the useful information. I've been holding off fighting one, didn't want to freeze my ass of for nothing. Also holding off with powering up an additional Raikou, but this has convinced me to do so. As I have been lacking the last few days with a researche quest, I'm not anywhere near a stone yet for Electivire and I've still got 200+ Raikou candies from back in the days.
Cheers