I remember seeing this pic featured on IGN when they were advocating third-party characters for Super Smash Bros. Brawl. Personally, I've always found this to be the cutest and most expressive drawing of Marina and I used it as a reference for two of my own pics. You can see them here: [link][link]
Love this! Mischief Makers is a game that most definitely deserves a remake and/or sequel. Would love to see it live again on the 3DS, and would die if Marina ever made her way to Super Smash Bros. one of these years.