Behold the newest of all the Regi Golems! Regidrago! Possessing absurd HP, reasonable defenses (In light of said HP), balanced physical and special attack, and a "comparatively" wide offensive movepool, given the choice between Regieleki and our dragon orb boi, I definitely recommend choosing the Dragon type Regi over the Electric one. Sure it doesn't have the blistering speed of Regieleki, in fact Regidrago's base 80 speed is its biggest turn off, but this Dragon Stone has better versatility that the other just can't compete with.
Drake of Dance
Ability: Dragon Maw (Dragon attack are boosted by 50%!)
Item: Life Orb/Dragon Fang
Nature: Jolly (+Speed -Sp.Attack)
EVs: (HP 4) (Attack 252) (Speed 252)
Moves
Dragon Dance
Dragon Claw/Outrage/Scale Shot
Fire Fang
Body Slam/Thunder Fang/Explosion/Dragon Energy
Set Details:
A straightforward Dragon Dance set that turns Regidrago into a physical sweeper. Dragon Dance shores up its physical attack while rectifying the average speed stat into something much more scary. And thanks to that large HP and workable defenses you might even be able to get in an extra Dragon Dance. Next comes the all important Dragon STAB, which thanks to its ability Dragon's Maw will get the equivalent of a Choice Band attack boost, and which option you go with is ultimately up to your playstyle. Dragon Claw has the most consistent power with no drawbacks or bonuses, Outrage has stupid amounts of power allowing you to decimate entire teams...until they send in their Fairy type and completely counter you (x_X), and Scale Shot while inconsistent in its power has the added bonus of boosting your speed while dealing damage (If you can get in at least 3 hits you are at about the same damage as a regular Dragon Claw). Fire Fang is a no-brainer for coverage since it handles the Steel types, most notably Ferrothorn and the Bug/Steels. And the last coverage move is a matter of preference. Body Slam has great all around neutral coverage with an added 30% chance of paralysis, Thunder Fang can surprise the surplus of Water and Flying types (Though usually your Dragon Maw STAB still does more damage), and Explosion is there as a last ditch effort to KO an opponent when you know you're about to go down, and sadly it's really your only option to handle Fairy types with any reasonable damage. Life Orb or Dragon Fang boosts your power even further, and your nature/EVs all go into attack but mostly speed.
Lindwurm Magic
Ability: Dragon's Maw
Item: Choice Scarf
Nature: Timid (+Speed -Attack)
EVs: (HP 4) (Sp.Attack 252) (Speed 252)
Moves:
Dragon Energy
Dragon Pulse
Ancient Power...
Round? (-_-)'
Set Details:
Okay, I'll be honest that this set kinda sucks. But it seems like a shame that we can't fully utilize Regidrago's signature move unless we focus on the special attack...with few other special attacking options. Dragon Energy is basically Water Spout only in Dragon type form. The Choice Scarf allows Regidrago to outspeed several threats, and thanks to the abysmal special movepool, restricting its other moves is not a heavy tradeoff. Between a base 150 STAB combined with a 50% boost from Dragon's Maw, this magical dragon orb can lay waste to anything that isn't a Fairy type or a specially defensive Steel type. Once your HP gets to around half you should shift to using Dragon Pulse instead to deal more damage. Sadly the offensive movepool is shallow here. Not as much as Regieleki, but still shallow. Ancient Power has a small chance of granting an omniboost, and Round...oh who am I kidding? Why the %$#& did GameFreak take out Hidden Power this generation!?
The addition of new Regi definitely reopens the door as to their origin story in the Pokemon mythos. Why did Regigigas create these golems? Was it serve serve as guardians? How did it create them? And if they originally came from Regigigas, does that mean...I wonder if...