Multiple Horde Partner Notes:

http://serebii.net/xy/hordes.shtml

http://serebii.net/omegarubyalphasapphire/hordes.shtml

Contrasting elements:

BST(Post Gen VI stats only): 

ORAS:

1. Oddish has 320 BST, Zigzagoon has 240 BST.
2. Gloom has 395 BST, Linoone has 420 BST.
3. Vileplume/Bellossom have 490 BST, Linoone has 420 BST.
4. Makuhita has 237 BST, Geodude has 300 BST.
5. Hariyama has 474 BST, Graveler has 390 BST.
6. Hariyama has 474 BST, Golem has 495 BST.

XY:

1. Gigalith has 515 BST, Carbink has 500 BST.
2. Boldore has 390 BST, Carbink has 500 BST.
3. Roggenrola has 280 BST, Carbink has 500 BST.
4. Trevenant has 474 BST, Sudowoodo has 410 BST.
5. Phantump has 309 BST, Bonsly has 290 BST.
6. Nidoran Male has 273 BST, Nidoran Female has 275 BST.

Ability Count(Post-Gen VI count only):

ORAS: 

1. Oddish-line has two abilities, Zigzagoon-line has three.

XY:
N/A

Types, Typings and Type Counts(Post Gen VI typings only):

ORAS:

1. Makuhita is Fighting-type, Geodude is Rock/Ground.
2. Oddish-line is Grass/Poison, Bellossom is Grass, Zigzagoon-line is Normal.

XY:

1. Roggenrola-line is Rock, Carbink is Rock/Fairy.
2. Phantump-line is Grass/Ghost, Bonsly-line is Rock.
3. Durant is Bug/Steel-type, Heatmor is Fire-type.
4. Zangoose is Normal-type, Seviper is Poison-type.

Common elements:

 
BST(Post Gen VI stats only): 

ORAS:

1. Plusle and Minun have the same 410 BST.

XY:

1. Tauros and Miltank have the same 490 BST.
2. Durant and Heatmor have the same 484 BST.
3. Zangoose and Seviper have the same 458 BST.
4. Plusle and Minun have the same 410 BST.

 Ability Count(Post-Gen VI count only):

 ORAS:

1. Makuhita-line and Geodude-line have the same amount of abilities, three.
2. Plusle and Minun have the same amount of abilities, two.

XY:

1. Roggenrola-line and Carbink have the same amount of abilities, two.
2. Phantump-line and Bonsly-line have the same amount of abilities, three.
3. Tauros and Miltank have the same amount of abilities, three.
4. Durant and Heatmor have the same amount of abilities, three.
5. Nidoran Male and Nidoran Female lines have the same amount of abilities, three.
6. Zangoose and Seviper have the same amount of abilities, two.
7. Plusle and Minun have the same amount of abilities, two.

 Types, Typings and Type Counts(Post Gen VI typings only):
ORAS:

1. Plusle and Minun have the same type, Electric.

XY:

1. Tauros and Miltank have the same type, Normal.
2. Nidoran Male and Nidoran Female have the same type, Poison.
3. Plusle and Minun have the same type, Electric.

Note: Lotad and Seedot are version counterparts in ORAS.