What The Shuck?!
Shuckle@Leftovers
Bold nature
Sturdy
252 HP/252 Defense/4 Sp. Def
~Toxic
~Infestation
~Sticky Web
~Power Split
Shuckle is, to put it mildly, very interesting. Best Defense and Special Defense you could ask for, but its other stats are in the toilet. Including HP, by the way, which seems counterintuitive to such a defensive Pokémon. And yet, Shuckle makes it work. Somehow. Somewhat. So yeah, Toxic and Infestation, they inflict the best kind of damage Shuckle can dish out- passive damage. Also, the latter traps the enemy so it continues to take passive damage. And Shuckle also gets STAB on Infestation, on the off chance you care about that. You can also lay down a Sticky Web, help the rest of the team out. And Power Split, that is a handy little move. What Power Split does is average Shuckle's Attack and Sp. Atk with the target's Attack and Sp. Atk. And considering how horribly low Shuckle's offensive stats are, this is practically cutting the enemy's Attack and Special Attack in half. As if Shuckle wasn't bulky enough, right?
Item heals Shuckle. Ability... uh... guarantees you'll... at least... get off a... Sticky... Web? Because... I don't know, I fail to see what can outright OHKO this thing, but I'm guessing there could be something out there, so yeah, as it stands, this is your best option. I suppose.
Other options:
*Shuckle gets Shell Smash, but instead of using this in a feeble attempt to completely reverse its stats (spoiler; won't work), you can actually use this with Contrary to further buff Shuckle's defenses.
*We've all been tempted to run Power Trick on Shuckle, and I don't think we can be blamed for that, considering what this would do for its physical power. Power Trick switches the user's Attack and Defense, which would make Shuckle physically frail as all hell in exchange for making it hit like a freight train. Better yet, it learns Gyro Ball, which benefits from both the grossly overpowered "Attack" stat and the horrible Speed (seriously, Shuckle is tied with Munchlax for slowest Pokémon ever!), as well as gems like Stone Edge, Earthquake, and I suppose Bug Bite if you need extra STAB or something. It's a set one might consider for a Trick Room team, and I'm sure it can get some good results, but it's a little gimmicky, to say the least.
*If you can find room for it, Shuckle does get Encore.
Abilities:
*Sturdy: If Shuckle is at full health and takes a hit that would OHKO it, it hangs on with 1 HP, and is also outright immune to moves designed to OHKO their targets. This is probably your best bet for Shuckle's Ability. Its selection of Abilities are none too useful. I don't see this getting a lot of use, mainly because Shuckle's too damn bulky to OHKO in most cases, but I suppose there's gotta be something out there that could OHKO it, so yeah.
*Gluttony: If Shuckle's holding a berry that it would eat at 25% health, it instead eats it at 50% health. I fail to see why you would run anything besides Leftovers on Shuckle to begin with, so yeah, this is not the best Ability for Shuckle by a long shot.
*Contrary: Shuckle's Hidden Ability. Shuckle's stats are increased by things that decrease them, and vice versa, including self-inflicted stat changes. Intimidate raises its Attack, Shell Smash boosts Defense and Special Defense while sharply cutting Attack, Special Attack, and Speed, things of that nature. It's an interesting option with Shell Smash, but Shuckle's not likely to have room in its moveset to squeeze that one in. Not a bad Ability in and of itself, but it needs to be on the right Pokémon to realize its potential, and Shuckle is not the right Pokémon.
Partners:
You know all those Pokémon that'd be great with just a little extra Speed, the ones I'm always recommending you use with Sticky Web support? Well, Shuckle is the Sticky Web support. There's many things out there, like Braviary and Krookodile, that would benefit nicely from the Sticky Web Shuckle lays down. Also, considering Shuckle's a defensive Rock-type, it wouldn't be out of place on the same team as the likes of Tyranitar or Hippowdon. Sandstorm damage goes nicely with Toxic and Infestation.
Counters:
Taunt pretty much shuts Shuckle down right then and there. Indeed, considering Shuckle's tied with Munchlax for slowest Pokémon ever, it's more or less impossible to not outspeed it with Taunt.
Opinion:
I honestly love this thing. It's tricky to use, but I love a challenge. Plus, I just like how it looks.
Prediction for next week:
Wobbuffet