Roggenrola is a pure Rock type, and well it has an okay design. There's nothing too great about it design-wise, but I don't mind the look of it personally. Then in regards to everything else, it has decent abilities, but definitely doesn't have that great of a movepool or that great of stats. Roggenrola is another that I like, but it pretty much just gets outclassed by most the other rock types in Unova, which is why I chose to rank it here.