I have an idea.
Move Slot Swap
Good name pending.
Premise: The first two moves of a Pokemon's moveset switch types.
So you could do stuff like:
Conkeldurr @ Flame Orb
Ability: Guts
EVs: 252 HP / 252 Atk / 4 Spe
Adamant Nature
- Bulk Up
- Facade
- Earthquake
- Mach Punch
or
Toxtricity @ Choice Specs
Ability: Punk Rock
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Boomburst
- Volt Switch
- Sludge Wave
- Hex
Potential Bans
Base: Gen8 OU
Bans: Nothing yet
Unbans: Nothing yet
Potential Questions
How can I determine an opponent's swapped move type?
When a swapped move is used, it will indicate the type next to the move like:
Toxtricity used Boomburst (Electric)!
For status moves, the type will not be shown, so it's not always clear which move is swapped with what:
Conkeldurr used Bulk Up!
How do status immunities (Fire to burn, Steel to poison, Electric to paralysis, etc.) work if the moves' type is switched?
Status immunities will stay as they are; if Will-o-wisp changes to a Poison-type move, Fire-types will still be immune. However, if Thunder Wave changes to a Normal-type move, Ground-types will be affected. Grass-types will also stay immune to powder moves
How about moves like Freeze-Dry and Flying Press?
Their super-effectiveness is part of the move itself, so it will also remain as is. So a Ground-Type Freeze Dry will be super effective against Rock, Steel, Poison, Fire, and Water.
How about the move-type-changing abilities (i.e. Pixilate, Aerialate, etc.) or abilities that affect moves of a certain type?
The move that now has the affected type will be affected. If Hyper Voice and Psyshock are switched, Pixilate will turn the Normal-type Psyshock into a Fairy-type move and boost its power. If Iron Head and Superpower are switched, Steely Spirit will boost the Steel-type Superpower. However, if Boomburst and Volt Switch are swapped, Punk Rock will still boost Boomburst. If Hyper Voice and Moonblast are swapped, Liquid Voice will change the Fairy-type Hyper Voice to a Water move, and Moonblast will be a Normal move. If Multi-Attack and Defog are swapped, RKS System will change the Flying-type Multi Attack to whatever type, and Defog will be a Normal move.
How about terrains?
Like with the abilities, it will affect the move that now has the type. If Psychic and Mystical Fire are switched, Psychic Terrain will boost the Psychic-type Mystical Fire.
How about hazards?
Since the weaknesses it factors is part of the move, those will stay as is. Spikes as any other type will not affect Flying-Types, Stealth Rock will still factor Rock weakness, and Toxic Spikes will be absorbed by Poison-types.
Potential Strategies
Setup Sweepers
This mechanic can give certain Pokemon stronger STAB or coverage. However, if a Pokemon gets a strong STAB, it could be left with a useless, weaker move wasting a space (If Mimikyu uses Shadow Claw and Wood Hammer, sure, it gets an 120-BP STAB move, but it also has a 70-BP Grass move it really doesn't need). Setup moves can take unneeded types and give a high-BP move STAB or coverage. I think Clangorous Soul/Boomburst Kommo-O, Nasty Plot/Fire Bast Hydreigon, and Bulk Up/Facade Conkeldurr will be really good.
Dual STAB
If one type should be on the stronger STAB move, it can now have it in this metagame. Flying-type Close Combat can guarantee White Herb activate, Rotom can pivot easier with Water-Type Volt Switch (also can get Fire-type coverage from Will-o-Wisp btw), and Obstagoon can hit Ghosts with Dark-type Facade.
Strong Normal Moves
Namely Boomburst, boosted Facade, Double-Edge, and Explosion. Boomburst/Volt Switch gets 140-BP STAB and can pivot on Ground-types, Facade/Flame Charge Flareon can boost and sweep with 140-BP STAB, and Explosion/Stealth Rock Gigalith can set up Rocks and "pivot" with a whopping 250-BP STAB move.
What about defense?
Bulkier Pokemon are not as affected by the mechanic, but they are especially critical with high-power moves everywhere. You can't predict which moves are swapped, but most of the time, the high-power moves are STAB moves, so you can refer to the opponent's type when pivoting into a defensive Pokemon. Heatproof Bronzong can wall the Kommo-o mentioned above, and Sylveon can beat Hydreigon, Kommo-o, and Conkeldurr (w/out Poison Jab). Also, Corsola-G can switch the type of Night Shade so it can hit Normal-types.
Questions for the Community
My main concern is that the meta might be too unpredictable. Do you guys think that? Should there be something that indicates the types of the two moves that were switched? Maybe the animation switches colors, if possible?
Would having the 3rd and 4th move switch types be more interesting? Or would that cause unnecessary headaches?
Should Stealth Rocks factor the weakness of whatever type it is, or just stay Rock?
Do you guys have a better name for this? My name sucks :(
Also, are we supposed to submit these after sharing our ideas here?