Delta Poliwag: The Snowing Pokemon: Ice Type. They adapt really well to cold and slightly warm water, being able to lower and lift its body temperature at ease. They are more commonly found in winter next to hot springs.
Delta Poliwhirl: The Hailing Pokemon: Ice Type. Evolves from Delta Poliwag at Lvl 25. Cold air is what is needs to survive. It can still wade through hot waters as long the air around it is cold.
Delta Poliwrath: The Blazing/Blizzard Pokemon: Ice and Fire Type. Evolves from Delta Poliwhirl with a Fire Stone or Ice Stone. It can generate fireballs from its hand and heat or cool the air around it with a difference of 20 degrees Celsius. This Delta is also known as the Snowball Emperor because of its ability to make the flaming snowballs it throws a sure hit.
Delta Politoed: The Snowstorm/Armor Pokemon: Ice and Steel Type. Evolves from Delta Poliwhirl when traded holding an Assault Vest/Metal Coat. It can no more alter the temperature around it, though it can survive even in the harshest subzero temperature using its icy powers, which fade when near hot objects. It is sought after by warriors, who want to use its indestructible hide for armor and shields.
BTW: You can let Delta Poliwrath learn Pyro Ball, one of the signature moves of Cinderace or my own move called Fireball Spew, which is a Fire Type version of Icicle Spear and Bullet Seed or Rock Blast and Bone Rush. And also possibly Delta Politoed can be like Shuckle(extremely low offense but extremely high defense).

Delta Mankey(Heaven): The Spirited Pokemon: Steel Type. More sources of food turned it to this form. It is very helpful so it gives out free berries all the time.
Delta Mankey(Hell): The Hopeless Pokemon: Ghost Type. Living in areas with scarce resources morphed it to this state. It steals food from others by teleporting in order to survive.
Delta Primeape(Heaven): The Spirited Pokemon: Steel and Rock Type. Evolved from Delta Mankey(Heaven) at Lvl 28. It sets up shops made out of boulders for little Pokemon. It is said it gained the Rock Type because its trustworthiness is as tough as stone.
Delta Primeape(Hell): The Evil Pokemon: Ghost and Electric Type. Evolved from Delta Mankey(Hell) at Lvl 28. Failing at stealing at least one crumb is all it can take, and it will get so angry it can make a giant crater with one attack. It sends out electric pulses in order to paralyze Pokemon and take their meals for its own.

Delta Psyduck: The Despair Pokemon: Poison Type. Streams of acid flow from its bill and eyes. This chemical can burn through the toughest of iron at strongest.
Delta Golduck: The Misery Pokemon: Poison and Ground Type. Evolved from Delta Psyduck at Lvl 33. They can shoot poison for a distance of around 90 km. It’s venom can seep through earth and rock, causing to make plants wither and die when planted there.

Delta Meowth(Rogue): The Yokai Pokemon: Fire and Ghost Type. The coin on their forehead is blazingly hot and can give burns to people who touch it. They can pass through solid objects but they are too scared to try.
Delta Meowth(Royal): The Monarch Pokemon: Rock and Electric Type. They form in groups sitting on stone pedestals for a traditional ritual to evolve. These Deltas turned to this form for extra speed against prey and predators.
Delta Persian(Rogue): The Yokai Pokemon: Fire and Ghost from Delta Meowth(Rouge) when sunny starting Lvl 22. The gem on their face is forged from the shadows. They also have a tail split with flames at the tip.
Delta Persian(Royal):The Monarch Pokemon: Rock and Electric Type. Evolves from Delta Meowth during a sandstorm starting Lvl 22. This species is highly recommended as a guard as it can stay still for hours and can stun any thief using their electrical powers.

Delta Venonat: The Wind Pokemon: Flying Type. One stream of wind under it is all it needs to keep it gliding for days using its shaggy hair. It can tuck them in to fall normally.
Delta Venomoth: The Storm Pokemon: Flying and Crystal Type. Evolved from Delta Venonat at Lvl 31. Crystal dust fall from its wings when it generates a lot of wind. Speaking of wind, it can whip up crystalline tornadoes blowing at max 100 km/h.

Also Delta Paras evolves to Delta Parasect at Lvl 24

Delta Paras: The Generator Pokemon: Electric and Grass Type. The small poles on its back generate electricity so the vines wrapping around Delta Paras will grow healthily
Delta Parasect: The Network Pokemon: Electric and Grass Type. Unlike the regular Parasect, they are not infected with a parasite. They use their electricity to communicate with each other and Electric types. Apparently, Grass types can surprisingly pickup this signal too.

Delta Oddish: The Oddity Pokemon: Ghost Type. They use their shadow energy to hide their true form, which is said to cause the “Mimikyu Effect” sending people to an almost death
Delta Gloom: The Altering Pokemon: Ghost Type. Evolved from Delta Oddish at Lvl 21. People normally see Delta Gloom for not what they really are. Their shadow powers fade at the midnight of a full moon, revealing its true but less horrific form.
Delta Vileplume: The Shadowy Pokemon: Ghost and Dragon Type. Evolved from Delta Gloom with a Dusk Stone. It is said that when people touch its dark spores, they suffer from nightmares that can span to a month. They are known as the Terror of Twilight.
Delta Bellosom: The Lunar Pokemon: Ghost and Bug Type. Evolved from Delta Gloom with a Moon Stone. Hikers that climb at midnight may find groups of Delta Bellosom performing a ritual to harness the power of the moon. Do not disturb their rituals, or you will pay dearly.
Anyways, please don’t make Delta Psyduck and Golduck a Psychic-Flying type, I make my own forms of Pokémon and Invinian Psyduck and Golduck is already that typing.

I haven’t read the full story but I know Deltas and these are some suggestions
Delta Zubat: The Propeller Pokemon: Bug Type. These Pokemon have no eyes so the Delta Zubat use their hearing. They need to eat almost constantly to be able to fly and survive.
Delta Golbat: The Drone Pokemon: Bug and Steel Type. Evolved from Delta Zubat at Lvl 22. They fly in groups to make a whirring noise to scare away little Pokemon and steal their berries.
Delta Crobat: The Helicopter Pokemon: Bug and Steel Type. Evolved from Delta Crobat when foggy starting Lvl 46. Delta Crobat now fly solo after squabbles and greed in the group. They can whirr their wings fast enough to blow away huge areas of fog and cause tornadoes.

Zubat: The Darkness Pokemon, a Dark type: This Pokemon absorbs the negative energy that comes from living beings.
Golbat: The Misery Pokemon, a Dark & Water type: Golbat are said to live deep in underwater, causing people sadness and misery.
Crobat: The Misery Pokemon, a Dark & Water type: Crobat is amazing at swimming in the depths, where no one has ever been before. Crobat tends to be attracted to people who have bad thoughts or are depressed.

the story is good.
spelling and grammar suck though. that makes the story rather uninteresting.

Psyduck, the Duck Pokemon, a Rock type: Psyduck tends to not move the entire night, staying still as a rock. However, when night comes, they make mischief near their homes
Golduck, the Duck Pokemon, a Rock & Dark type: Golduck are masters of stealth, able to sneak into your house and live there for a month without you knowing

Meowth, the Scratch Cat Pokemon, a Fairy type: Meowth charms Pokemon to give them their food. It is quite common for kids to have this Pokemon, as it is a perfect companion
Persian, the Scratch Cat Pokemon, a Fairy type: Persian slinks around people, acting innocent until they strike. They are great at tricking people, as they can make it look like someone else is taking their things

Paras, the Mushroom Pokemon, a Poison type: Paras has mushrooms growing on it's back. But beware, these mushrooms are highly toxic. One touch and you'll be poisoned easily
Parasect, the Mushroom Pokemon, a Poison & Ice type: Parasect lives in the coldest of climates. The Mushroom on it's back thrives from snow and coldness

Please update

Bonjour je pense que tu as fais quelques petite erreurs comme faire évoluer un pokémon plusieurs fois ans différents chapitre (par exemple Blastoise et Axew) mais c'est pas très grave l'histoire reste très intéressante et j'attend la suite avec impatience.

please update as i love this story!