Several of Mario's voiced lines didn't exist in the original Japanese version of the game, and were added for western releases:

• "Hello" and "Press Start to Play" during the demo screen with Mario's head.
• "Okey-dokey!" when choosing a save file.
• "Let's-a go!" when choosing a star.
• "Game over." when Mario runs out of lives.
• His dreams about pasta are missing.
• "I'm-a tired." - when the player is idle.
• "So long-a Bowser!" - when Mario throws Bowser a long distance.
• "D'oh!" - when long-jumping, sliding, or diving into a wall.
• "Boing!" - when bouncing off of a Spindrift's head.
• Mario will say either "Yahoo!", "Wha-ha!", or "Yippee!" during the last jump in a triple jump. In the Japanese game, he says "Yahoo!" every time for the third jump.
• In the opening sequence, Mario says "Yahoo! Ha ha!" when he leaps out of the pipe instead of just "Yahoo!" in the Japanese version.