this team looks pretty solid.
for jynx, i don't know if sacrificing psychic to get body slam on her is a good idea. i think if anything has to go, it has to be substitute. definitely stick with psychic though. those special falls are big.
i like body slam. that chance of paralyzation is just too important. plus, i don't like that icky recoil, and with a few S'dances, depending on the pokemon you hit, you might be taking some sick recoil.
sandslash is nice. and with these body slams providing some par support, slash could wreck some havoc. i never really liked him a whole lot, because i prefer golem/rhydon who eat explosions, which are so rampant throughout the metagame.
chansey is nice. although i prefer reflect on there, probably over tbolt. reflect/twave/softboiled is nice annoyance. ice beam is sufficient enough for an attack. you CAN use tbolt if you really want, though. just giving you an alternative.
articuno is looking good (the second one). reflect/rest is always nice, and with that special, you might be able to leave him out to rest, depending who the opponent has out there. i like the ice beam/blizz combo. blizz is just too little PP for it being the only move, and there isn't a whole lot else to put on it.
Hypno, i like the second set, except with psychic over sub. so i guess its kinda like the first one too, except with s-toss over reflect, haha. resting hypno is a must. don't leave home without it. it can stall and stall and stall kazam one on one. depending on who gets the special falling luck. :/
overall, i'm seeing an extreme lack of physical attackers. i know you have swords dance venusaur, and bslam on jynx, but i'm more or less referring to tauros/persian/snorlax/dodrio, the big physical attackers of the metagame. and no eggy is interesting either. eggy is one of a kind. starmie can always double as a kazam, and many other pokemon are interchangeable, but eggy is the one mainstay i always see on rby teams. interesting how you left him out. i'd like to hear your reasoning. although, of course this could just be a random, non-competitive team. anyway, over its solid. good job. rby is still the best version