Ditto

Ditto is a shapeshifting Pokémon. They have pale skin, they have dusty lavender hair, black eyes, and they can change their body at will. They're usually sweet, shy, quiet, and will transform into anything it sees, even inanimate objects. When it sees an enemy, it will change its DNA code to match theirs. It avoids being attacked while sleeping by changing its appearance to look like a rock. While trying to transform into something from memory, it will get details wrong. They will try to befriend other Pokémon by transforming into one of their kind.

"Breed/Breeding" – The act of impregnation.

"Nesting" - Nesting is when an pokemon will gather anything that comforts them, or anything with their mate's scent, and put it somewhere that is comfortable and calming for them. Usually, on a bed of in some sort of safe area like a closet. When a pokemon is pregnant, they will begin nesting as well. As more time goes on and the pokemon becomes closer and closer to having their pups/offspring, they will stay in their nest more and more.

"Heat" – Estrus or better known as the heat is a period during the reproductive cycle when an pokemon is sexually receptive, signaling they are ready for mating. A pokemon only goes into heat every three months.