So, in both Gen VII and VIII, they released regional variants. If you have ideas for a regional variant, here's a place to share them. I'll show mine, a regional variant for the Aron family
Artarian Aron: The Ice Armor Pokémon
Type: Ice/Rock
Abilities: Ice Body or Rock Head/Hidden Ability: Filter
Because of the constant cold rusting their iron body, Aron in Artaria have adapted to replace their iron with ice. They eat mostly ice as well as iron. Their armor glimmers when near evolution.
Evolves into Artarian Lairon at level 32
Moves
Start: Tackle, Harden
4: Mud-Slap
7: Headbutt
10: Ice Fang
13: Rock Tomb
16: Protect
19: Roar
22: Ice Beam
25: Rock Slide
28: Take Down
31: Aurora Veil
34: Icicle Crash
37: Shell Smash
40: Double-Edge
43: Frost Breath
46: Avalanche
49: Blizzard
Artarian Lairon: The Ice Armor Pokémon
Type: Ice/Rock
Abilities: Ice Body or Rock Head/Hidden Ability: Filter
Artarian Lairon compete with the size of their horns. The one with the largest horn is the leader of a herd. A broken horn is seen as a sign of glory, facing stronger enemies until the day the horn breaks mean that the individual will be seen as a veteran battler
Evolves into Artarian Aggron starting at level 42 in an area with the Frozen Stone
Start: Tackle, Harden, Mud-Slap, Headbutt
10: Ice Fang
13: Rock Tomb
16: Protect
19: Roar
22: Ice Beam
25: Rock Slide
28: Take Down
31: Aurora Veil
35: Icicle Crash
37: Shell Smash
40: Double-Edge
47: Frost Breath
51: Avalanche
55: Blizzard
Artarian Aggron: The Ice Armor Pokémon
Type: Ice/Rock
Abilities: Ice Body or Rock Head/Hidden Ability: Filter
It has a natural rivalry with Beartic, and lines its icy helmet with teeth collected from victories against its rival. Its ice is thick and cold enough that even molten lava won't melt it. The club on its tail is strong enough to smash diamond to pieces.
Start: Tackle, Harden, Mud-Slap, Headbutt, Ice Punch, Head Smash, Ice Hammer
10: Ice Fang
13: Rock Tomb
16: Protect
19: Roar
22: Ice Beam
25: Rock Slide
28: Take Down
31: Aurora Veil
35: Icicle Crash
39: Shell Smash
45: Double-Edge
51: Frost Breath
57: Avalanche
63: Blizzard
72: Sheer Cold
Artarian Aron: The Ice Armor Pokémon
Type: Ice/Rock
Abilities: Ice Body or Rock Head/Hidden Ability: Filter
Because of the constant cold rusting their iron body, Aron in Artaria have adapted to replace their iron with ice. They eat mostly ice as well as iron. Their armor glimmers when near evolution.
Evolves into Artarian Lairon at level 32
Moves
Start: Tackle, Harden
4: Mud-Slap
7: Headbutt
10: Ice Fang
13: Rock Tomb
16: Protect
19: Roar
22: Ice Beam
25: Rock Slide
28: Take Down
31: Aurora Veil
34: Icicle Crash
37: Shell Smash
40: Double-Edge
43: Frost Breath
46: Avalanche
49: Blizzard
Artarian Lairon: The Ice Armor Pokémon
Type: Ice/Rock
Abilities: Ice Body or Rock Head/Hidden Ability: Filter
Artarian Lairon compete with the size of their horns. The one with the largest horn is the leader of a herd. A broken horn is seen as a sign of glory, facing stronger enemies until the day the horn breaks mean that the individual will be seen as a veteran battler
Evolves into Artarian Aggron starting at level 42 in an area with the Frozen Stone
Start: Tackle, Harden, Mud-Slap, Headbutt
10: Ice Fang
13: Rock Tomb
16: Protect
19: Roar
22: Ice Beam
25: Rock Slide
28: Take Down
31: Aurora Veil
35: Icicle Crash
37: Shell Smash
40: Double-Edge
47: Frost Breath
51: Avalanche
55: Blizzard
Artarian Aggron: The Ice Armor Pokémon
Type: Ice/Rock
Abilities: Ice Body or Rock Head/Hidden Ability: Filter
It has a natural rivalry with Beartic, and lines its icy helmet with teeth collected from victories against its rival. Its ice is thick and cold enough that even molten lava won't melt it. The club on its tail is strong enough to smash diamond to pieces.
Start: Tackle, Harden, Mud-Slap, Headbutt, Ice Punch, Head Smash, Ice Hammer
10: Ice Fang
13: Rock Tomb
16: Protect
19: Roar
22: Ice Beam
25: Rock Slide
28: Take Down
31: Aurora Veil
35: Icicle Crash
39: Shell Smash
45: Double-Edge
51: Frost Breath
57: Avalanche
63: Blizzard
72: Sheer Cold