+
DNA Donors: Pidgeot + Terrakion
Offspring: Pion
New Typing: Flying / Fighting
New Stats: 93/119/90/71/85/110 (+6 HP, +15 Attack, +8 Defense, +5 SpDef, +6 Speed) [BST 567]
New Ability and Desc: Eye of Justice (Keen Eye + Justified) [Raises Accuracy by one stage upon taking damage from a Dark-type attack.]
Notable Moves: Close Combat, Sacred Sword, Brave Bird, Swords Dance, Stone Edge, Earthquake, Agility, U-Turn, Roost, Taunt
Role Description: Pion is a bird of justice. With its decent 119 attack and great 110 speed Pion can do work on teams by itself. It has a great typing and great coverage in its STABs and Stone Edge / Earthquake. It can even use Swords Dance to be a deadly sweeper. Eye of Justice is...pretty useless, especially since it doesn't grant immunity. At least Stone Edge won't miss now? However, Pion is more that just a strong physical attacker...
+
DNA Donors:「MEGA」
Offspring: Mega Pion
New Typing: Flying / Fighting
New Stats: 93/119/95/136/95/130 [BST 667]
New Ability and Desc: No Guard [Ensures all moves used by and against the Pokémon hit.]
Notable Moves: Hurricane, Focus Blast, Heat Wave, Agility, U-Turn, Roost, Taunt, Close Combat, Sacred Sword, Brave Bird, Swords Dance, Stone Edge, Earthquake
Role Description: Pion can also become a deadly special sweeper, or even the normal SD set. Its weaker but it has a better speed stat of 130. However, the special set is the main draw. No Guard Focus Blast and Hurricane make Mega Pion a very powerful threat, and it can run Heat Wave for coverage. It also has decent bulk with 93/95/95, which lets it abuse Roost. Sadly it doesn't have boosting on the Special Side, but overall Mega Pion is very potent.
EDIT
I'm going to edit this post to make my last Fusion
+
DNA Donors: Diancie + Moltres
Offspring: Moltie
New Typing: Fairy / Fire
New Stats: 90/100/120/120/120/79 (+20 HP, +8 SpA, +3 SpD, +9 Speed) [BST 629]
New Ability and Desc: Calamity (Clear Body + Pressure) [Prevents the increase the PP cost of the user]
Notable Moves: Flamethrower, Moonblast, Roost, U-Turn, Stealth Rock, Defog, Fire Blast, Agility, Calm Mind, Will-o-Wisp, Overheat, Explosion, Light Screen, Reflect
Role Description: Fairy / Fire is a cool typing, honestly. It has some neato resists, although it does have an unfortunate weakness to SR. It also has Roost for dank recovery to go with this typing and good 90/120/120 bulk. 120 SpA is also decent, so Calm Mind or Rock Polish are still great sets to use on this monster. It also has cool utility moves like U-Turn, Defog, and Screens. It could potentially Mega Evolve, except Diancite is banned (good - otherwise this would be borked).