Because the NES had a higher resolution and the fact that it, in general, could fit more on screen and allow for bigger environments, Masahiro Sakurai claimed to have problems with Kirby's float ability as it became far more powerful then it was on the Game Boy. The game director and his team cleverly resolved this by creating the game's large information panel UI on the lower-third of the game screen, which was also perfect because the developers could show off unique artwork and info to the player based on the game's new copy ability system.
Contributed by PirateGoofy