Sunosaur
Type:
Stats: 100/75/85/90/100/75 - 525 BST
Abilities: Overgrow / Drought
New Moves: Fire Blast, Flamethrower, Earth Power, Heat Wave, Quiver Dance, Strength Sap
Competitive Value: Sunosaur will work as a bulky Special sweeper does to Quiver Dance access and Drought to power-up Fire-type moves and for instant Solar Beam. Its Defense is not all that great, but it got Strength Sap to compensate. Its Special Attack is also not spectacular without using Quiver Dance first, making it a setup bait.
Sunosaur-Mega
Stats: 100/95/105/105/135/85 - 625 BST
Ability: Chlorophyll
Competitive Value: Mega Sunosaur functions as a Special Sweeper, with Drought from the pre-Mega form and then Chlorophyll for the doubled speed. Its Special Attack is still not outstanding compared to other Mega Evolution, meaning that a Quiver Dance is a must to work properly.
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Charteor
Type:
Stats: 79/115/70/75/70/120 - 534 BST
Abilities: Blaze / Hard Crystals
(Hard Crystals: Ground-type moves do nothing on this Pokémon; when hit by a Ground-type move, Speed is increased by one stage.)
New Moves: Stone Edge, Rock Slide, Accelerock, Head Smash, Rock Tomb, Rock Polish, Rock Throw, Sandstorm, Glare, Wild Charge, Iron Head, Bullet Punch, Waterfall, Acrobatic
Competitive Value: A Physical sweeper capable of dishing powerful damage with Head Smash or Stone Edge, and able to outspeed most threats in OU, and can set a Dragon Dance for a good sweeping. A double vulnerability to Water, in addition of its fragility, doesn't do it any favor, but it got Wild Charge or Thunder Punch to push away most Water-type.
Charteor-Mega
Stats: 79/145/80/85/80/155 - 634 BST
Ability: Technician
Competitive Value: Although still frail, Mega Charteor becomes an even more threatening Physical Sweeper, with an even better Speed tier, outspeeding almost all of the OU threats. It also got Technician, allowing it to hit harder with Metal Claw, Brutal Swing/Bite, Rock Tomb, Flame Charge, Power-Up Punch, Accelerock, Bulldoze and Aerial Ace, giving it a multitude of purposes and versatility in the same time.
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Dracoise
Type:
Stats: 110/70/100/90/100/60 - 530 BST
Abilities: Torrent / Pixieproof
(Pixieproof: Bounce any Fairy-type moves aimed at this Pokémon back to the user of these moves.)
New Moves: Draco Meteor, Outrage, Thunderbolt, Thunder, Flamethrower, Fire Blast, Sludge Bomb, Sludge Wave, Water Shuriken, Nasty Plot, Calm Mind, Recover, Thunder Wave, Giga Drain
Competitive Value: Makes an efficient stall or bulky Special Sweeper with one less weakness than Kingdra and Palkia thanks to Pixieproof. It also got Recover to restore HP from damage, and have plenty of coverages to plow through potential threats, and Scald, Thunder Wave or Toxic will give hindrance to various opponents.
Dracoise-Mega
Stats: 110/80/135/110/135/60 - 630 BST
Ability: Energetic Spirit
(Energetic Spirit: When Poisoned/Badly Poisoned, Burned or Paralyzed, its Special Attack is boosted by 1.5x. Cannot be fully paralyzed.)
Competitive Value: Bulkier and stronger for Special Attack, Mega Dracoise is a threat not to be laughed at. While becoming vulnerable to Fairy-type again, its bulk can manage it to survive most of their unboosted attacks and retains appropriate coverages such as Sludge Bomb or Flash Cannon. It can also punish the likes of Suicune or other Scald spammers, or anyone who Paralyzed it, with Energetic Spirit, which when this happens, its Special Attack is boosted further, which can go even further with Nasty Plot or Calm Mind. Be prepared for that King of the Draconic Tur-- Oh wait, Bowser had copyrighted that.