I think you would have to have an IQ below 80 to not be able to assume that Kirby and Metaknight are likely related.
My guess has always been the generic anime plotline of having a protagonist who is helped and/or hindered by a mysterious masked older brother whose identity isn't as secretive as they would like to be (Speed Racer & Racer X, Domon & Kyoji).
KIRBY was so important for me because i used always kirby in the smash bros of n.64 but when i buy the gamecube and the super smash bros melee i start using falco and i know some tips of falco my favorite characters and i go to use falco all my life (i think so).
Kirby is a really cute...what ever he is.He is the strongest character in Super Smash Brothers Melee,b-cuz he can absorb any player`s power.Kirby ninja /foe eek !!!