The team as of now is generally very weak to special attackers, because Qwilfish cannot take any special hit and Meganium eventually falls from +2 Shadow Balls from Cofagrigus, Flamethrower and Fire Blasts from Manectric and Moltres, Bug Buzz from Galvantula, burns from Scalds and even Focus Blasts from things such as offensive Tangrowth and Sceptile, since he lacks reliable recovery. That's why i think that Wish support will be almost mandatory. For this reason here is my nomination:
Flareon @ Leftovers
Trait: Flash Fire
Calm Nature
EVs: 248 HP / 8 Def / 252 SpD
- Wish
- Protect
- Lava Plume
- Toxic
Flareon walls Moltres, even with SR up, LO Manectric with no SR up, and even with SR up most of the times(and Scarf Manectric easily), Tangrowth, Galvantula, Cofagrigus and LO Sceptile even with SR up, so this means that it has excellent synergy with the rest of the team. It also provides some much needed recovery for the rest of our pokes, which badly need it, since they have no reliable recovery on their own. Between Leech Seed and Wish, our grass-water-fire core will be pretty difficult to wear down, if we manage to keep hazards off the field. Lava Plume is a standard STAB move that has a nice burn chance and Toxic is there for the things we can wall but can't do anything back with Lava Plume, such as any Cofagrigus variant, Moltres and bulky waters.
If SR seems like a too big problem for a defensive mon, then here is my next nomination, if i am allowed to make 2:
Clefable @ Leftovers
Trait: Magic Guard
Calm Nature
EVs: 252 HP / 4 Def / 252 SpD
- Wish
- Protect
- Seismic Toss
- Grass Knot / Toxic
Clefable counters most pokes that Flareon does, although it has some troubles with Tangrowth and Sceptile (LO FB hurts a lot). Toxic is generally very useful and allows us to deal with Cofagrigus, but GK hits hard Omastar, which could be problematic otherwise and some other pokes such as Kabutops, Rhydon, and Poliwrath. Still a great poke, which doesn't have to worry about entry hazards and passes even greater Wishes to help the team!