: I may be wrong on this, but every time I shot the item, no sparks appeared.
: But a grunt will show up in a Ultra Ghost. Very useful in the next fight.
: I'm assuming the ghost is the easter egg. I've taken out every enemy in
: the level and the Ghost only shows up after I shoot this thing. There
: doesn't seem to be a limit on them either. I was playing alone and got six
: of them to show up. Only one at a time though. The Grunt is a terrible
: shot. Simply board the ghost to acquire it.

Huh, how very weird. Thanks for the tip! I'll be sure to try it out.