How to get Pikachu, a liar, to swim in his pocket?

Pikachu's acquisition method: Twisted Egg Hunting Ground.

Pikachu mostly moves in groups and rarely stays in one place. Pikachu's good hearing benefits from his big ears. Many domestic Pikachu can understand and interpret human words, even better than most pet dogs. Pikachu is a popular pet. It is not difficult to keep a good relationship with it, just take it to do some small health activities.