Pikune

within each type of poke ball, there exists a miniature space the size of each space is different based on the quality of pokeball, and the environment too based on the type of pokemon, that's why some pokemon can be caught by some special pokeball. and bigger pokemon will need more space then normal pokeball can give, so great ball and all others are good, and based on strength too, the pokeball might malfunction later on, so, it's best to use better pokeballs for each pokemon based on their size and strength, because pokeball also have restraint on pokemons, it might be harder for them to come out on their own. imagine a piggy coming out of normal pokeball and master ball, masterball will be hard, and you can probably customize the restraint level on it based on your preference,

Pikachu never gonna judge a book by it's cover after this

QUALITY SPICE LUGIA

boiled lugia egg. that's the first thing that came to my mind