YOU SAID:
Hello! Its-a-me, Mario!
INTO JAPANESE
こんにちは!マリオだよ!
BACK INTO ENGLISH
Hello! It's Mario!
INTO JAPANESE
こんにちは!マリオです!
BACK INTO ENGLISH
Hello! This is Mario!
INTO JAPANESE
こんにちは!マリオです!
BACK INTO ENGLISH
Hello! This is Mario!
That didn't even make that much sense in English.