ピッカピッカ✨︎ チャァァ⋯⋯💤︎ げんき しとぉや!! ピィックウィ〜🔆︎ びぃぃ〰︎〰が〰︎〰︎💢︎

The Pikachu with folded arms is saying in Japanese, “Ohss! Future champion!” This is a famous greeting phrase of the Gym guide in Kanto and Johto’s, which corresponds to “Yo! Champ in making!” in the English versions.