There was no Shadow Kirby in Kirby 64. The Shadow Kirby appearances are:
Kirby and The Amazing Mirror: Shadow Kirby was an enemy.
Kirby Squeak Squad: Kirby could spray-paint himself to look like Shadow Kirby.
There is no Dark Kirby in Kirby 64, but there is an enemy called Shadow Kirby in Kirby and the Amazing Mirror. Defeating Shadow Kirby gives you an item. But Shadow Kirby turns good for some reason.[Shadow Kirby was always good. Kirby was just being too arrogant to listen. See 'Kirby's Adventure' to see where this all started. ~zeroslash]
Kirby, because Kirby can just suck up shadow and have all his powers so really theres no difference
There is a total of 74 crystal shards in Kirby 64.
Kirby, Meta Knight, Galactic Knight, Keeby*, Shadow Kirby, Red Kirby, Green Kirby, Blue Kirby,Marx** *Keeby=Yellow Kirby **Marx May be an altered Kirby.
Yes.
In the online mode.
Kirby 64 The Crystal Shards does feature a Multiplayer mode where 4 players can play three different minigames.
there are 6
Mario Sonic Kirby Falco Shadow
Check the control settings of your emulator.
To battle Zero two (o2) in Kirby 64, you need to collect all the shards, then battle miracle matter (ripple star boss) again, and then you battle Zero Two.
Shadow Mario first appered in Super Mario Sunshine, which came after Super Mario 64, so no.