I've never rated, but why not start?
So, the party-hardy Dewgong. "OK, I'm ready!"...snooze..."No, really, I'm up!"....snooze..."What happnened?"
Dewgong brings an interesting dynamic to those who play it. I am a personal fan of 'flippy' cards just because they are unpredictable and fun (I CAN'T WAIT FOR TOMORROW'S COTD!!!). Dewgong can be a very good wall if you're a lucky person. Unfortunately, its attack is overpriced for the damage that it does. Granted, it activates its Body, but that same Body is very easily turned off with Lati-lock, Cessation Crystal. If its Body isn't turned off, though, and you remain asleep after using a Power, its own attack, or your opponent's attack, minus 40 is pumped up Delta Reduction, so it is nice. Unfortunately, it doesn't have a Resistance, which downgrades the card further.
For Modified play, not the best choice for competitive decks. 4/10
For Limited play, if you get the energy on it, HAVE FUN! 8/10