Ecco the Dolphin is challenging, yes. The graphics were amazing when that first came out. The sounds are melancholy and set mood of the story very well, too.
It's kinda frustrating. I can't remember if the cheat code that let you be invincible, never run out of air, and choose your level is in the VC version. I'd actually decide not to buy it if that code's inaccessible in the Wii version.
