What Nintendo game do you regret not buying?

Infendo

I don’t know if it’s my biggest regret — there are dozens of heralded Nintendo games I have yet to purchase.

But I really regret not buying the Metroid Prime Trilogy. Freakin’ thing sells for almost $140 now. Even though I owned the original three, I want the “remastered” trilogy.

What about you: What Nintendo game do you most regret passing on?

See also: What Nintendo purchase do you most regret?