Hoshi No Senshi Meta Knight
Smash Lord
Yes and it's also a conspiracy.when you fight snake, THATS A TRAP! 0_o
My least favorite traps:
Fighting Snake (mentioned above.)
Palkia and Dialga at Spear Pillar
The flippers at Green Hill Zone, even though I dodge 'em 99% of the time.
The water at Jungle Japes.
That's about it for now.