Alright, time for my 'mons again.
The crazed leopard dragon strikes back.
DNA Donors: Kyurem + Liepard
Offspring Name: Kyurepard
New typing: Dragon/Dark
New base stats: 95/119/70/119/70/121 (+10 Atk, +10 SpA, +20 Spe) (594 BST)
New Ability + description: Pressure + Unburden = Demoralize (Opposing Pokemon have their Speed halved as long as they are holding items)
Notable moves: Nasty Plot, Dark Pulse, Dragon Pulse, Earth Power, Ice Beam, Grass Knot, Focus Blast, Draco Meteor, Flash Cannon, Psychic, Roost, Hone Claws, Knock Off, Dragon Claw, Gunk Shot, Play Rough, Stone Edge, Iron Tail, Sucker Punch, Seed Bomb, Zen Headbutt, U-turn, Trick
Role identification: This is much like Infernape, except stronger, faster, bulkier, and with Hydreigon's typing. Also like Infernape, this has the ability to go either physical or special, or even mixed if you so desire. While Kyurepard's Ability might seem overpowering, it only affects foes which still have their items. It also does not protect Kyurepard from priority, a good amount of which hits it super-effectively. Kyurepard's bulk is also lacking, meaning that even a fairly strong neutral hit is going to do a lot of damage.
An electric rock-beast bird thing...?
DNA Donors: Gigalith + Zapdos
Offspring Name: Zapdolith
New typing: Rock/Electric
New base stats: 88/113/108/113/105/63 (+20 SpA, +20 SpD) (590 BST)
New Ability + description: Sturdy + Pressure = Unrelenting Pressure (If an attacking move would KO the bearer from full health, the bearer survives the attack with 1 HP and the PP for the move that hit the bearer is reduced to 0)
Notable moves: Stealth Rock, Defog, Thunder Wave, Roost, Volt Switch, Autotomize, Thunderbolt, Power Gem, Earth Power, Heat Wave, Extrasensory, Signal Beam, Stone Edge, Wild Charge, Earthquake, Iron Head, Superpower, Baton Pass
Role identification: Has access to both Stealth Rock and Defog, as well as a slow STAB Volt Switch. Zapdolith is also a pretty decent attacker, seeing as it has Autotomize and nice offensive options. Its Ability also helps it set up Rocks or an Autotomize, and completely screws over Choice-locked attackers.
Move over, Flygon, there's a new Dragon Boomburster in town.
Parents: Exploud + Druddigon
Shared Egg Group: Monster
Offspring Name: Explougon
New typing: Normal/Dragon
New base stats: 101/116/87/86/92/68 (550 BST)
New Ability + description: Soundproof + Sheer Force = Sound Force (The bearer's attacks with secondary effects count as sound-based moves and deal 1.2X damage, but lose their secondary effects)
Notable moves: Work Up, Boomburst, Draco Meteor, Fire Blast/Flamethrower, Ice Beam, Dragon Pulse, Extrasensory, Dark Pulse, Sucker Punch, Sludge Bomb, Focus Blast, Surf, Return, Dragon Claw, the elemental punches, Zen Headbutt, Earthquake, Rock Slide, Iron Head, Gunk Shot, Superpower, Stealth Rock
Role identification: I made this mainly to get a Normal/Dragon (yes I know that there already is one). Exploud maybe wasn't the best choice, but whatever. This has a bunch of coverage and can hit hard with Boomburst, but is restricted to Work Up for boosting Special Attack. Explougon's low Speed is also troubling, but you've got Sucker Punch to help get around that problem.
A threatening toxic troublemaker.
Parents: Dragalge + Gyarados
Shared Egg Group: Dragon
Offspring Name: Draegarados
New typing: Poison/Water
New base stats: 90/110/95/89/122/73 (579 BST)
New Ability + description: Poison Point + Intimidate = Venom Glare (On switch-in, the bearer poisons adjacent opponents)
Notable moves: Dragon Dance, Gunk Shot, Waterfall, Earthquake, Crunch, Stone Edge, Play Rough, Ice Fang, Venoshock, Hydro Pump, Ice Beam, Thunderbolt, Fire Blast/Flamethrower, Focus Blast, Sludge Bomb, Dark Pulse, Scald, Toxic Spikes, Venom Drench, Roar, Taunt
Role identification: It came to my attention that all my fusions are weak to Fighting, so I made this to act as a Fighting check. Anyways, you have Dragon Dance, two good STAB moves in Gunk Shot and Waterfall, and decent coverage. Apart from that, Draegarados is perhaps the only user of Venoshock in FE (outside of maybe Venoqueen), due to its Ability poisoning its opponents. There's also Venom Drench, which is completely unused in standard play but could be dangerous in Draegarados' hands. It also has a Mega Evolution, but it doesn't much need it to be effective.
Parents: Dragalge + Gyarados
Shared Egg Group: Dragon
Offspring Name: Mega Draegarados
New typing: Poison/Dark
New base stats: 90/140/125/99/152/73 (679 BST)
New Ability + description: Mold Breaker
Notable moves: Everything listed above
Role identification: Well, Mega Draegarados has a different role now. It can't automatically spread poison and can't run an item, but it's a better DDance user and gets a secondary Dark typing to hit Psychics. This was the main reason I put Poison as the primary typing; this way it can still sort of check Fighting-types. As for stats, 90/125/152 bulk is pretty terrific, and 140 base Attack isn't anything to sneeze at either.
A spectral balloon of serenity.
DNA Donors: Drifblim + Shaymin-Sky
Offspring Name: Drifaymin
New typing: Ghost/Grass
New base stats: 125/91/64/120/64/123 (+5 Def, +15 SpA, +20 Spe) (587 BST)
New Ability + description: Unburden + Serene Grace = Rapid Grace (The bearer's Speed is doubled on any turn that it uses a move with a secondary effect)
Notable moves: Calm Mind, Seed Flare, Shadow Ball, Earth Power, Dazzling Gleam, Giga Drain, Psychic, Thunderbolt, Energy Ball, Air Slash, Synthesis, Trick, Swords Dance, Seed Bomb, Phantom Force, Zen Headbutt, Knock Off, Sucker Punch, Defog, Baton Pass, Will-O-Wisp, Hex, Aromatherapy, Tailwind, Memento, Destiny Bond, Magic Coat
Role identification: A bunch of possible sets here. There's Calm Mind, Choice Specs (which is made all the better by access to Trick), Will-O-Wisp plus Hex, defensive Defog, offensive Defog, you name it. Drifaymin's Ability lets it be straight-up unable to be outpaced if you aren't running priority. 125/64/64 bulk isn't bad either, to be honest. Drifaymin's defensive typing is a bit of a letdown, as while it resists Water, Ground, and Electric, and is completely immune to Fighting moves, it's also weak to Ice, Fire, Dark, and Flying. All in all, though, a really solid 'mon.
The solar dragon warrior shall be your opponent.
Parents: Tropius + Haxorus
Shared Egg Group: Monster
Offspring Name: Troxorius
New typing: Grass/Dragon
New base stats: 98/118/97/76/89/84 (562 BST)
New Ability + description: Solar Power + Rivalry = Solar Warrior (If Sunny Day is active, the bearer's moves do 1.5X damage; if any other weather is active, the bearer's moves do 0.75X damage)
Notable moves: Dragon Dance, Leaf Blade, Dragon Claw, Earthquake, Poison Jab, Low Kick, X-Scissor, Rock Slide, Night Slash, Natural Gift, Synthesis
Role identification: A Dragon that likes the sun. If you can manage to get a Dragon Dance up when you're in sunlight, count on things getting demolished. Natural Gift is interesting, because you can get a one-use coverage move of any type you want (including a 100 BP physical Fire move boosted by Sunny Day and Troxorius' Ability!). However, more consistent attacking options will likely be preferred.