Quantos Pokémon uma Pokébola pode guardar por vez?

Although the answer is typically "one pokémon per pokeball" (Ash keeps a selection of balls about his person for precisely this purpose and occasionally agonised over which ones to take with him) there are some instances where multiple Pokémon can be kept in a single ball. In this case they're treated as a single entity.

Kangashkhan

Exeggcute

Slowbro

magneton

It's one Pokémon per Poké Ball. Ash had multiple Poké Balls. Poké Balls can shrink for easier storage and be put on a belt. Up to six can be stored on a belt and the others are carried in backpacks, sacks etc.

fonte

I think 1 Pokemon can be stored in a pokeball usually in games, but when i see Pokemon black and white which is telecast on cartoon network may tell ash that if you catch more Pokemons it will shrink to the size . But in Pokemon season 1 ash carry 6 pokeballs and other Pokemon should transfer to the profesar oak like muk,bulbasaur and kingler.