What is Modern Gen 1?
Modern Gen 1 (MG1) is a solomod that puts every move, type and Pokemon from Gen 9 National Dex into Gen 1, creating a distinctly unique metagame. Mechanics are taken from gen1customgame on PS! and aren't changed by the council. Only Pokemon legal in Gen 9 National Dex are legal here.
Here's a rundown of MG1's mechanics:
F.A.Q 
Q: How does Special work?
There's no special, it's seperated into Special Attack and Defense like in later gens. Gen 1 Pokemon have their SpA/SpD equal to their Special. Moves like Nasty Plot that raise SpA do not raise SpD and vice versa. Amnesia, Growth, and Psychic raise/drop both SpA/SpD. SpD changes are invisible.
Q: How do the new types work?
Dark, Steel and Fairy all function properly defensively, but Fire does not resist Steel and Fairy, Poison does not resist Fairy and Dark is not super effective against Ghost or Psychic. Fairy moves are physical.
Q; Why is X banned?
Partial Trapping: Later generation partial trapping moves do not lock the user, so they are banned. As for the four partial trapping moves that already existed in RBY, the many new speed boosting moves like Dragon Dance and Shell Smash, a complex ban of speed boosting + partial trapping would be needed. Rather then introduce a complex ban, which goes against modern tiering policy, the council decided to ban partial trapping moves instead.
Sleep Moves: With the addition of insanely fast sleepers with pivot moves, there is absolutely no counterplay to getting slept. On top of the 1-7 sleep turns, which tends to be an OHKO in a metagame as fast paced as MG1, sleepers can punish you regardless of what you do by using a pivot move, always putting themselves in a good position on top of dishing out sleep.
Council
Copen (Tier Leader)
juoean
DiamondDiancie25
Gen 8 Resources
Modern Gen 1 (MG1) is a solomod that puts every move, type and Pokemon from Gen 9 National Dex into Gen 1, creating a distinctly unique metagame. Mechanics are taken from gen1customgame on PS! and aren't changed by the council. Only Pokemon legal in Gen 9 National Dex are legal here.
Paste the challenge command in the PMs of the other person. Command does not check move legality or legality of unreleased mons. You can also play it on Dragon Heaven which has builder support!
/challenge gen1customgame @@@ !! Max Level = 100, !! Max Team Size = 6, !! Max Move Count = 4, Obtainable Formes, -Dig, -Fly, -Bind, -Clamp, -Fire Spin, -Infestation, -Magma Storm, -Sand Tomb, -Snap Trap, -Thunder Cage, -Whirlpool, -Wrap, -Spikes, -Toxic Spikes, -Stealth Rock, -Sticky Web, -Stone Axe, -Ceaseless Edge, Freeze Clause Mod, -all items, -Fake Out, -Wonder Room, -Trick Room, -Magic Room, -Lucky Chant, -Tailwind, -Safeguard, -Gravity, -Confuse Ray, -Supersonic, -Swagger, -Sweet Kiss, -Teeter Dance, -Flatter, -Protect, -Detect, -Shell Smash, Endless Battle Clause, OHKO Clause, Evasion Moves Clause, Species Clause, Sleep Moves Clause, -Arceus, -Basculegion, -Basculegion-F, -Calyrex-Ice, -Calyrex-Shadow, -Darkrai, -Deoxys-Base, -Deoxys-Attack, -Deoxys-Defense, -Deoxys-Speed, -Dialga, -Dragapult, -Electrode-Hisui, -Eternatus, -Giratina, -Groudon, -Ho-oh, -Inteleon, -Iron-Bundle, -Iron-Valiant, -Koraidon, -Kyogre, -Kyurem-White, -Kyurem-Black, -Lugia, -Lunala, -Magearna, -Marshadow, -Mew, -Mewtwo, -Miraidon, -Naganadel, -Necrozma-Dusk-Mane, -Necrozma-Dawn-Wings, -Palkia, -Pheromosa, -Rayquaza, -Regigigas, -Reshiram, -Slaking, -Sneasler, -Solgaleo, -Xerneas, -Walking-Wake, -Zacian, -Zamazenta, -Zekrom, -all abilities, +No Ability
/challenge gen1customgame @@@ !! Max Level = 100, !! Max Team Size = 6, !! Max Move Count = 4, Obtainable Formes, -Dig, -Fly, -Bind, -Clamp, -Fire Spin, -Infestation, -Magma Storm, -Sand Tomb, -Snap Trap, -Thunder Cage, -Whirlpool, -Wrap, -Spikes, -Toxic Spikes, -Stealth Rock, -Sticky Web, -Stone Axe, -Ceaseless Edge, Freeze Clause Mod, -all items, -Fake Out, -Wonder Room, -Trick Room, -Magic Room, -Lucky Chant, -Tailwind, -Safeguard, -Gravity, -Confuse Ray, -Supersonic, -Swagger, -Sweet Kiss, -Teeter Dance, -Flatter, -Protect, -Detect, -Shell Smash, Endless Battle Clause, OHKO Clause, Evasion Moves Clause, Species Clause, Sleep Moves Clause, -Arceus, -Basculegion, -Basculegion-F, -Calyrex-Ice, -Calyrex-Shadow, -Darkrai, -Deoxys-Base, -Deoxys-Attack, -Deoxys-Defense, -Deoxys-Speed, -Dialga, -Dragapult, -Electrode-Hisui, -Eternatus, -Giratina, -Groudon, -Ho-oh, -Inteleon, -Iron-Bundle, -Iron-Valiant, -Koraidon, -Kyogre, -Kyurem-White, -Kyurem-Black, -Lugia, -Lunala, -Magearna, -Marshadow, -Mew, -Mewtwo, -Miraidon, -Naganadel, -Necrozma-Dusk-Mane, -Necrozma-Dawn-Wings, -Palkia, -Pheromosa, -Rayquaza, -Regigigas, -Reshiram, -Slaking, -Sneasler, -Solgaleo, -Xerneas, -Walking-Wake, -Zacian, -Zamazenta, -Zekrom, -all abilities, +No Ability
Here's a rundown of MG1's mechanics:
- Field effects (hazards, weather, etc), items and abilities are not present.
- Special is seperated into Special Attack and Defense for all Pokemon.
- Moves are assigned to physical or special depending on typing.
- Physical: Normal, Fighting, Flying, Poison, Ground, Rock, Steel, Bug, Ghost, Fairy
- Special: Fire, Water, Grass, Electric, Psychic, Ice, Dark, Dragon
- Moves and Pokemon are their earliest versions.
- Standard RBY mechanics, including but not limited to old partial trapping and skipping the recharge turn on KO, apply to new moves.
- Some moves are changed, more info here.


Q: How does Special work?
There's no special, it's seperated into Special Attack and Defense like in later gens. Gen 1 Pokemon have their SpA/SpD equal to their Special. Moves like Nasty Plot that raise SpA do not raise SpD and vice versa. Amnesia, Growth, and Psychic raise/drop both SpA/SpD. SpD changes are invisible.
Q: How do the new types work?
Dark, Steel and Fairy all function properly defensively, but Fire does not resist Steel and Fairy, Poison does not resist Fairy and Dark is not super effective against Ghost or Psychic. Fairy moves are physical.
Q; Why is X banned?
Partial Trapping: Later generation partial trapping moves do not lock the user, so they are banned. As for the four partial trapping moves that already existed in RBY, the many new speed boosting moves like Dragon Dance and Shell Smash, a complex ban of speed boosting + partial trapping would be needed. Rather then introduce a complex ban, which goes against modern tiering policy, the council decided to ban partial trapping moves instead.
Sleep Moves: With the addition of insanely fast sleepers with pivot moves, there is absolutely no counterplay to getting slept. On top of the 1-7 sleep turns, which tends to be an OHKO in a metagame as fast paced as MG1, sleepers can punish you regardless of what you do by using a pivot move, always putting themselves in a good position on top of dishing out sleep.
Council
Copen (Tier Leader)
juoean
DiamondDiancie25
Gen 8 Resources
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