Hmm... well, if you don't mind some advice, I can give you a few suggestions that would make it more the style Rescreatu aims for with its Creatu? :3
First of all, I would suggest getting rid of the shamrock and the St. Patrick's Day aspect altogether. It's unlikely that we're going to release a seasonal pet for a holiday like St. Patty's Day, Thanksgiving, 4th of July, etc. I could go into the reasons, but I don't think this is the place. As well, "symbols" used to decorate a Creatu don't really fit into the site's character anymore. I know, I know, the Iluvu -- but that was a long time ago, and it's a special case.
This is a bit less objective and depends a lot on what you want to do. I'm not sure if it's been suggested already, but try hybridizing it. =D Choose another animal species. Give it some of those features. Antlers? Fish scales? The hind legs of a kangaroo? Imagine what that would look like mixed with a platypus, and go with it. ^^ Chances are you'll end up with something unique and interesting -- but still platypussish.