New Crossgen Evo/Regional Form Thread:
I'll start

Semporer (Seaking evo):
Evolution Method: Lvl-up to Level 60 w/ holding a King's Rock
Type: Water
New Stats: 95/117/85/55/110/78/BST:540
New Abilities: Storm Strike/Lightning Rod/(HA)Queenly Majesty
Storm Strike: 1.5x Attack and Special Attack in Rain
New Moves: Dragon Dance, Liquidation, Aqua Jet, Ice Shard, Icicle Crash, Outrage

Ledislam (Ledian evo):
Evolution Method: Lvl-up Ledian, while it knows Arm Thrust (learned at lvl 1 as a Ledian)
New Type: Bug/Fighting
New Stats: 80/110/95/35/120/75/BST:515
New Abilities: Swarm/Skill Link/(HA)Iron Fist
Iron Fist Buff: Damage boost is now 1.5x
New Moves: Bullet Seed, Rock Blast, Wing Flap, Superpower, Bulk Up, Earthquake, Body Press, Wide Guard, Arm Thrust, Rock Slide, Stone Edge, Thunder Punch
Wing Flap: Flying-Type Arm Thrust
Comet Punch Buff: Now 25 base power + Bug-Type

Regional Donphan:
New Type: Fire/Ground
New Stats: 90/120/110/50/60/70/BST:500
New Abilities: Sturdy/Solar Power/(HA)Sun Run
Sun Run: Chlorophyll reskin
Notable New Moves: Flame Charge, Flare Blitz, Wild Charge, Solar Blade, Will 'o' Wisp

Regional Ursaring
New Type: Dark/Fairy
New Stats: 90/120/65/885/85/55/BST:500
New Abilities: Guts/Misty Meander/(HA)Tough Claws
Misty Meander: Boosted Speed in Misty Terrain