SPRING 




Spring is characterized by the new beginning of the year. It's here where you're gonna have most of the flower mons, as well as chirping birds and cute stuff like that. Stuff related to mist and dew also falls in here. Since it's also the season where girl's day/doll festival happens, you can have girly fairy-type beat pokemon in spring. Lots of pink as well. Spring-type moves are related to the idea of a new beginning, so you'll find a lot of healing and cleric moves in here. It's really more of a utility-based type rather than a purely offensive one.
Strong against winter
Strong against sea -> Sea is usually calmer during spring. Water also helps early flowers bloom
Weak against summer
Weak against serenity -> Serenity stays unwavering against of the passage of time
Weak against storm -> Wind will kinda wreck your flowers lol
SUMMER 




Summer is where the sun shines the brightest: this is where you'd find a lot of what could be considered fire-types. It has sort of a duality, considering it's both related to energy as well as lazying around. It's the season of beaches, vacations, and cicadas. Summer also is the more "male" counterpart to spring's girlishness. Summer moves include a lot of heat-related offensive moves as well as upbeat buff moves.
Strong against spring
Strong against night -> Sunshine lights up darkness
Strong against winter -> Heat warms up ice
Weak against autumn
Weak against sea -> The sea absorbs heat
Weak against serenity -> Serenity stays unwavering against of the passage of time
AUTUMN 




Autumn is the season of harvest and work. The pokémon of this type are usually fields and forests pokemon, which both harbour a warm orange at this time of year. You'll find mushrooms, nuts, rodents and migrating animals under this type. Just like spring, you'll find a lot of healing under autumn, although its usually more life-steal based. You'll also find a slew of moves needing charge turns or moves that set things up for later (i.e. hazards, status).
Strong against summer
Strong against earth -> Harvests happen thanks to the earth
Weak against winter
Weak against serenity -> Serenity stays unwavering against of the passage of time
Weak against sea -> You lose your harvests against a flood
WINTER 




Winter is basically ice-type lol. It's where you'll find everything related to snow and cold. As a harsh and difficult season, winter pokemons and moves will often be offensively oriented. Winter also plays with status and debuffs a fair bit. It does have another face though, being the season of Christmas and of the New Year.
Strong against autumn
Strong against earth -> Cold kills plants and freezes soil
Strong against sky -> Pokemon logic
Strong against night -> Winter nights are harsh for nocturnal animals
Weak against serenity -> Serenity stays unwavering against of the passage of time
Ineffective against spring -> Spring is symbolizes a new start over the winter, so its stronger than the other season interactions.
NIGHT 




Night is similar to dark-type in the sense that it's the typing for the vicious and the cunning who only attack once the sun is down. It's also the typing of everything moon and stars related. It's a very backhanded type, which often focuses on making impact on the game without necessarily dropping the HP of opponent pokemon (stuff like Taunt, Wish, Knock Off).
Strong against folklore -> Pokemon logic
Strong against serenity -> Fears makes inner peace difficult
Weak against summer -> Night is shattered by light
Weak against itself -> Vicious people know each other's tactics
EARTH 




Earth encompasses both things relating to the ground itself as well as things growing out of it: you'll find a lot of what would be ground, rock or grass types otherwise. It's way more related to the landscape itself than a vague "lives on it" (not many terrestrial animals would actually be earth-type except for stuff like moles and worms). Earth is usually a very straightforward typing that focuses both on self-sustain and damage.
Strong against storm -> The earth has suffered countless storms, yet it's still here.
Strong against man-made -> Nature will inevitably outgrow humanity
Weak against autumn -> You get harvested
Weak against itself -> Rock on more rock is eh
Ineffective against sky -> Can't touch the sky from here
SKY 




Sky is, as you can imagine, pretty-much flying type. It contains most things birds and meteorological phenomenons (things like clouds, rain, gusts, aurora borealis perhaps). Stuff related to "heaven" also falls in here: gods and dragons will more often than not be sky type. Sky pokemons are often pivots and can feel very slippery.
Strong against sea -> Birds sometimes go fishing
Weak against serenity -> A calm and peaceful mind fears neither the meteo nor the gods
Weak against itself -> Clouds vs clouds = more clouds???
SEA 




Water type. Do I need to say more? It's important to understand that, if yes everything sea-type is usually water-coded, not everything water-coded would fall in the sea category. As told earlier, rain is more of a spring/sky thing, and things like light refreshing streams are more summer than sea. As for the moves, sea possess a lot of consistent but sometimes passive options.
Strong against summer -> The sea absorbs heat
Strong against autumn -> You lose your harvests against a flood
Weak against earth -> Can't touch the sky from the earth
Weak against sky -> Can't touch the sky from the sea
Weak against spring -> Water helps flowers bloom
Weak against itself -> You can't wet water
SERENITY 




A type based around calm, contemplation and thinking before moving. Very close to psychic type in terms of flavor, it's also the typing where a lot of "honorable warriors" sort of mons would fall in. It's a defensive typing very good at shutting down opponent strategies with moves having similar effects to Haze and Defog, bringing the fight back to a stiller stand. It's also very "balance" coded, containing stuff similar to Pain Split or Psycho Shift.
Strong against winter -> Serenity helps you stay calm even against cold and pain
Strong against storm -> Calm is the answer against anger
Weak against night -> Fear troubles inner peace
Weak against folklore -> Fear troubles inner peace (bis)
Weak against itself -> It's kinda hard to "outcalm" someone else lol
STORM 




Storm is the violent type. It contains everything disasters and anger. Hurricanes, thunderstorm (electricity in general), seismic activities and volcanic eruption fall into storm. Storm is often very high-risk high-reward, containing a lot of glass cannon pokemons. Storm moves are usually centered around doing damage regardless of consequences: You'll often find recoil moves in here.
Strong against spring -> Wind will kinda wrecks your flowers lol
Strong against summer -> Kinda ruins your vacation plans
Strong against man-made -> Your roof won't do much against an earthquake
Strong against itself -> Violence is a never-ending cycle
Weak against earth -> The earth has suffered countless storm, yet it's still here.
Ineffective against serenity -> Calm is the answer against anger
FOLKLORE 




Pokémon who were given life from the stories of man, aka the yokai type. It's pretty much ghost-type with a few extra steps. Things of earsay and legendary status will also sometime find their way here. These pokemons are uncommon but usually very strong. Folklore has a lot of burst options, which are very powerful in the right situations but aren't particularly spammable.
Strong against serenity -> Fear troubles inner peace
Strong against itself -> Ghost vs ghost pokemon logic
Weak against night -> Shady ppl don't give a shit about the supernatural ig
Ineffective against man-made -> Ghosts can't really influence the human world
MAN-MADE 




Pokémon who were given life from the hand of man. Robots, golems, living objects, you name it. This typing is particular in the way that interacts very little with other types and also has very few actual damaging moves, man-made pokemons usually relying more on their other typing. On the other hand, it has a handful of exclusive moves that can make impact in sometimes bizarre ways. Some of those moves are related to the mon interacting with their creator, like getting fixed or upgraded.
Weak against Earth -> Nature will inevitably outgrow humanity
Ineffective against folklore -> Humans are powerless against the mystic
The "typeless" type is only for moves. This exists for moves that can have different types depending on conditions or moves that don't really fall into any other types (extremely rare, usually on status moves). Think of it as a mix between normal and ???.