TomChick - News - 11/20/05 - Link
I don't know what 'henshin-a-go-go' means any more than I know what 'abracadabra' means. I briefly considered using it as a sort of catchphrase to say at parties while cocking my index finger and thumb at someone, gun-style. Maybe while winking, too, although that might require a bit of practice in the mirror. Too cheesey? I've heard it said enough times to recognize that it's supposed to be cool.
And now I can hear it on my Nintendo DS. Read my Yahoo review of Vietwiful Joe: Double Trouble here.