Every time Pikachu says "Pika-pi", he means Satoshi which is Ash's Japanese dub name, so every time he said that in the scene where Ash "died", he was crying Ash's name, sad, text, stone, statue, crying, Pikachu, Ash Ketchum, Pokemon: the First Movie; Pokemon
Are You Pikachu Or Meowth You got: You’re Pikachu! You’re Pikachu! You’re sweet, friendly, and stronger than you look. Almost everybody loves you, and if they don’t love you then they’re probably trying to steal you, so watch out for that.