In order for funny creatures to appear in your world, you need to create a spawner for each animal. And then tame with fish, carrots, apples and other food so that they become your friends.
POCHITA

According to the plot of the manga, this is a demon dog with a chainsaw in its head. Sometimes he barks, and sometimes he growls like an instrument.
Create a spawner:

Feed him his favorite food, it could be fish, watermelon, carrots, an apple, or even bread.
He will follow you wherever you go.
PIKACHU

This is a famous character from Pokemon. He looks like a mouse, and his tail resembles lightning, as he has electrical abilities.
Create a spawner:

Feed him his favorite food and he will follow you.
HAPPY

This creature from the cat race is a character from the Fairy Tail Manga.
To get it you need to create a spawner:

Feed him treats to tame him.
KON

According to the plot of the manga, this is the soul that occupies the body of a small lion.
Called via spawner:

For a creature to become your friend, it must be fed and tamed.
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