Decided to look a little into this game which is largely underlooked (even 3D Blast's had more exposure). Though my skills at looking into games are very limited, I did find a few interesting entries, most of them leftover from the original Puyo Puyo game (note the sprites were edited because their original palettes were not in Mean Bean Machine): Arle's cutscene sprites are still in the game. Most of them even load in cutscene mode, suggesting some data for a playable character there may still exist. The fact she is completely unmodified would also suggest that there was never any plans to put Sonic or anyone else in her place. High Score font from the original game. Note it isn't replaced by Mean Bean Machine's own score font when loaded (Puyo Puyo had an odd scrolling background for it's High Score screen). The Japanese text for the name entry font is also there. The Cutting Room Floor site beat me to this one, but the entire tile set for the toy block arena from Puyo Puyo is still there (the Options screen loads it for it's background tiles). The Japanese text is also there. Curiously the remains of Lesson Mode don't load this tile set, suggesting it was modified before it got omitted. Again TCRF found it first, but it's worth showing for those who don't know. Puyo Puyo was ported from it's arcade variant and some remains exist even in Mean Bean Machine. I don't know if anyone else wants to contribute, but it's worth fishing for interest.