Camerupt - Not enough Special Defense, is going to have to take 2 hits because of low speed.
Can take 2 hits from +1 Raikou and always 2HKO back. How's that not a counter?
Nidoqueen- Shadow Ball from a Calm Mind hurts unless you have the Rivalry debuff.
Again Nidoqueen can survive 2 hits from +1 Raikou and 2HKO back. Lol at Rivalry quip, I don't have a clue what you're getting at.
Cradily- Only works in sandstorm and still takes alot from thunderbolt. Not all carry earthquake, and eartquake still won't 1HKO.
Takes laughable damage from Thunderbolt even without SS, can SD up and Recover when necessary, then obliterate Raikou with STAB attacks. No EQ required.
Muk - No electric Resistance, Sub will prevent you from Tricking
If it can take two +1 Thunderbolts and 2HKO back with Poison Jab, lack of resistance doesn't matter. And Tricking? What do you mean?
Umbreon - Good, but what can it do to one that's behind a sub?
I thought we were talking about SDS' set, but its irrelevant anyway. Sub is just a waste of HP. Umbreon breaks it then continues to wear down Raikou whilst sponging special hits. It's not rocket science.
Lanturn - Sub/Calm Mind will eventually beat it
Again, I was referring to SDS' set, but Waterfall can consistently break the Subs anyway.
Ampharos - An OK counter, but can't hit Raikou back very hard, so it doesn't really work out as planned.
Ampharos can throw up a Light Screen, then Seismic Toss to eventually wear it down, and possibly paralyze Sub-less variants.
I don't know why we are making such a fuss about this though. I was just refuting SDS' claim that his Raikou set was virtually unstoppable. That's not to say whether it's broken or not, as counters, or lack of, has little to do with a Pokemon's tier status anyway.
The regirock set is played late game... so you know what the opponents fighters are... also, if your Registeel is not CroSteel, it is going to lose, and if so, it will still be a stall battle.
After just two Curses, Registeel's Iron Head will OHKO with a crit, which is bound to happen eventually, and can occasionally flinch in the meantime. Regirock needs almost max Attack to have that kind of chance with the weak and ineffective Rock Slide.