What the heck?

I read that if you have a level 100 shuckle, in a triple battle, with both of its teammates using helping hand, and shuckle is holding a metronome, and used power trick to switch its attack and defense, and used skill swap on a pokemon with pure power, and shuckle has been turned into the ice type, attack is +6, both of shuckles teammates need to have the ability flower gift, weather needs to be sunny, on the fifth turn of a defense curl boosted ice ball, (which can be learned by mimic)(and it has to be used consecutivly with no misses, when used against a level 1 gible, with 0 IVs/EVs, thats defense has been lowered 6 stages, and thats under the effect or forest's curse,

If everything was done right, and you get a critical hit, shuckle will do 721,899,685 damage.