Jellicent was one of the best Pokemon in gen 5 singles, and it's still great this time around. Specially Defensive Jellicent @ Leftovers Water Absorb Calm (+SpDef -Atk) 252 HP/252 SpDef/4 SpAtk || 156 HP/96 Def/252 SpDef -Scald -Toxic -Taunt -Recover Very self-explanatory set. This bad boy can take any unboosted special hit you throw at it, and often survives strong physical hits well enough to get off the Toxic. Once you've poisoned them, use a mixture of Recover and switching to things that cover Jellicent's weaknesses. Anything you can't Toxistall to death generally doesn't appreciate being burned, so you've got Scald on deck to start doing big residual damage to stuff like Skarmory. Gliscor is a great partner for its Electric immunity and Protect stalling (plus they form a Stealth Rock + spinblocker combo), and Jellicent takes the Water and Ice moves directed at Gliscor with impunity. Ferrothorn is another awesome option, but sadly it lost its Ghost and Dark resistances that made it a truly perfect teammate for Jellicent. Jellicent also likes Dark and Dragon partners for their resistances, but none are particularly appealing. Umbreon fills a relatively similar role and is pretty redundant. Goodra has a few options for how it can be run, but generally it's some sort of special wall/Toxistaller. Hydreigon has the unique property of resisting all of Jellicent's weaknesses, making him a good offensive complement. Pick the first EV spread if you want a completely dedicated special sponge, or the second one if you want something more well-rounded. 404/176/339 defenses or a nice round 380/200/339. Subtract EVs from Special Defense and add them to Speed as you see fit to outspeed other base 60ers (Sylveon, Clefable, Porygon2, Swampert, Empoleon, Aegislash, Tyranitar, other Jellicent) and get the clutch Taunt/Toxic in first. Things to watch out for include Rotom-W, Ferrothorn, Snorlax, Venusaur, Gengar, Breloom, Blissey, Toxicroak, Clefable with Calm Mind and Magic Guard, Dragon Dancers with Substitute, Heatran with Toxic, and Mega Kangaskhan with Crunch. Basically anything that you can't poison, anything that will outspeed you and poison you first, or anything that doesn't care about Water moves/being burned/being poisoned all at the same time. Physically Defensive Jellicent @ Leftovers Water Absorb/Cursed Body 252 HP/136 Def/120 SpDef || 252 HP/220 Def/36 SpDef Calm (+SpDef -Atk)/Bold (+Def -Atk) -Will-O-Wisp -Recover -Taunt/Magic Coat/Shadow Ball/Ice Beam -Surf/Hydro Pump/Shadow Ball/Ice Beam Choose the ability based on your team's matchups to Water--Water Absorb is just better in general, though. Again, add Speed EVs as you see fit, particularly useful if you run Taunt and less so if you run Magic Coat. 404/210/303 or 404/254/255 defenses ensure that you'll survive most things. Magic Coat bounces back Toxic, Stealth Rock, Spikes, Will-O-Wisp, Thunder Wave, and other non-attacking moves that Jellicent doesn't like, but it doesn't protect you from stat boosters. Shadow Ball has great neutral coverage, only being resisted by Dark and blocked by Normal, but Surf and Hydro Pump are good STABs to make up for Jellicent's mediocre Special Attack. Ice Beam can hit Grass, Gliscor, and Dragons unexpectedly hard, but you can get walled easily by Water types without Toxic. Definitely one of my favorite Pokemon and a big contributor to my team.