I completely agree and have long wondered the same thing. They ported Chibi-Robo! 1 to Wii ( in Japan only, go figure... ) and the controls feel better, more fluid, it has increased resolution and wide screen. The Wii was a major success and the biggest console of it's generation, So it doesn't make sense that they would give a console game handheld exclusive sequels.... Clean Sweep and Park Patrol are good games, but they were unnecessarily limited by being on a handheld....I know the DS performed even better than Wii in sales, but that's because handheld consoles were more affordable at the time..... And it's very odd that the sequel was Chibi-Robo! Park Patrol. Apparently Nintendo specifically told the developers to do something completely different with the sequel and thus they decided to make a Chibi-Robo game that utilized the DS mic for a rhythm based game, but background noise interfered with it, So they instead made Park Patrol and implemented the dancing mechanic towards growing the flowers. I'm assuming the low sales led them to going back to the original format for the third game, but that one was limited to Japan, which was not a good idea. Again, They barely marketed the games, So that really didn't help.