Here is a Top 5 Defensive, SpDefensive, and HP-Bulky Pokemon in each Kalos Dex (Not counting Mega Evolutions):
Central Kalos
Defense
- Aegislash-S - 60/150/150
- Chesnaught - 88/122/75
- Scrafty - 65/115/115
- Wormadam-S - 60/105/85
- Vespiquen - 70/102/102
SpDefense
- Florges - 78/68/154
- Aegislash-S - 60/150/150
- Kecleon - 60/70/120
- Scrafty - 65/115/115
- Gardevoir/Gallade (Same stats) - 68/65/115
HP
- Snorlax - 160/65/110
- Gogoat - 123/62/81
- Exploud - 104/63/73
- Audino - 103/86/86
- Aromatisse - 101/72/89
Coastal Kalos
Defense
Steelix - 75/200/65
Cloyster - 50/180/45
Carbink - 50/150/150
Probopass - 60/145/150
Ferrothorn - 74/131/116
SpDefense
Probopass - 60/145/150
Carbink - 50/150/150
Mantine - 65/70/140
Umbreon - 95/110/130
Sylveon - 95/65/130
HP
Wobbuffet - 190/58/58
Wailord - 170/45/45
Alomomola - 165/80/45
Drifblim - 150/44/54
Hariyama - 144/60/60
Mountain Kalos
Defense
Shuckle - 20/230/230
Avalugg - 95/184/46
Aggron - 70/180/60
Torkoal - 70/140/70
Skarmory - 65/140/70
SpDefense
Shuckle - 20/230/230
Goodra - 90/70/150
Cryogonal - 70/30/135
Gothitelle - 70/95/110
Rotom* - 50/107/107
HP
Wigglytuff - 140/45/50
Xerneas/Yveltal - 126/95/98
Amoongus - 114/70/80
Whiscash - 110/73/71
Lickylicky - 110/95/95
*All formes but original Rotom