so 2 blizz and a thunder and t-bolt... ok here is the scoring (altho asher above did say he used return, but since he posted blizzard last i will assume thats the 2nd move he wanted)
the hyperbeams had impacted eachother, *remember all moves r being done at 1ce* 2 furiocious blizzards hit eachother causing zapdos confusion, but since thunder hits from the clouds it makes a direct hit anyways on articuno, and thunder bolt altho didnt hit articuno too much as the blizzard was more powerful, it did protect zapdos with an almost shield of static energy... damage for all attacks v
120+120+STAB FOR BOTH=360x2 *sup. eff.*=720-200=520. damage reduced by t-bolt
120+95+stab for both=322.5x2 *s.e.*=645-200=445. since damage was ruduced ^, most of the energy was used to reduce the damage done by blizzard and only a bit hit articuno, *remaining power was 75*
as the unexpected thunder hit the articuno from the sky, it stunned it also interrupting its hyperbeam, causing paralysis, preventing artiunco to continue using blizzard all the way thru. which further weaked its attack power... -40-40=-80 damage... sicne it used the same move 2ice, and paralysing it would reduce the attack of 1 blizz, it reduced the attack of both blizz by 80. so 520-80=440
zapdos wins