Almost a 3 year bump...
Me and 4matsy were theorizing about getting 256 Crashes, using the same method for getting 256 Mikes. To do this, I went against the Tree Boss and repeatedly used Select to drop Crash while I damage him with apples. However, the final bit is just a sliver from possible because any stars around shatter after defeating a boss, so I had to be on the far left side, fire the last apple without hitting the Crash star, then have the star right in front of you to swallow (actually, you can only get it in as far as Kirby's mouth), and this leaves about a 5 frame window. So after the Star Rod fires out, you can swallow the Crash and try the glitch, but unlike Mike, Crash doesn't have a little hop, nor a countdown (Crash goes from 1 to not having it, instead of 0), so it's impossible to roll over to 256, since 1 is the only possible number it can be and it never increases or decreases.
But at least my efforts weren't all for naught. If you press B as soon as you touch the Star Rod (3 frame window), you can get an image of Kirby in a Cannon for about 2 frames.
EDIT: Now this is ironic. As a kid, I always had the French version, so I didn't think of this as a big deal, but BagOfMagicFood just showed me that Cannon is not in the English version. Neat!
EDIT 2: There isn't supposed to be a Cannon panel in the Japanese version either, but I beg to differ. =)
EDIT 3: WOW! When doing the Cannon trick in the Japanese version, Kirby does a crazy warp:
http://www.youtube.com/watch?v=tbBF0hw4Nso