Shuckle is UU, why does everyone talk about him like he's a standard? "Suicune will come in and set-up" and blah blah blah.
Shuckle@Leftovers
Defense Curl
Encore
Toxic
Rest/Protect
Suggested Nature/EV: Careful, 252 HP, 4 DEF, 252 SD
Yields: 244 HP, 497 DEF, 614 SD
This set is extremely hard to break, with maxed out SD probably only CM'd or water attacks will be breaking through, as a single defense curl will send your already high defense soaring. Toxic for your offensive move, and to lure out aromatherapists/heal bellers. Encoring a non-damage move (stat-up, sub, status, aroma/bell) can give you a turn to set up another pokemon, or at least force a switch. Encoring an attack give you a chance to switch to a resister, or again at least force a switch. Actually, I'll stop talking about encore now, you all know how it works.
If you're opponent is playing some weird and random (read: flawed or bad) strategy that allows you to take two turns doing nothing, or you have a aroma/beller, you can use rest. Or you can go with protect to find out what attack your opponent plans to use on Shuckle, and to give you a free turn to heal.
Again, Shuckle is UU...
The current analysis treats him like a standard, and also makes it seem like he's SUPPOSED to try and get a kill with toxic. Meh... wrap will NEVER last long enough... The second set looks more like a fun-team set.
Oh, and on a different note, with the addition of XD moves, Altaria is one of the best heal-bellers in UU right now... you could make a moveset based on it, or at the very least add it to the first set's third move slot or put it as alternative moves.
Cloud Nine Golduck with Surf/Ice Beam can be used as a reliable counter to most sunnybeamers, surprisingly enough. Most of the sunnybeamers rely on chlorophyll for their speed, and so Golduck can come in and give the suddenly-slower grass type some hell with ice beam. If it's Rapidash or a fire using it, Surf does the trick. Also most people forget about Cloud Nine being present on Golduck, and proceed to try and launch a solar beam anyways, giving you a free turn to whack them. Mention this?
Bolded to make sure you didn't ignore it after reading about Shuckle.