Crustle's cool design tips the balance in its favour for me, personally. I've never had much time for either of these critters, and while they both do have things going in their favour (Amoonguss' cool name and crazy-good HP; Crustle's typing and movepool), it all comes down to their designs. Of which Crustle takes the cake. I'd probably never use any of these critters in a team, but this was a surprisingly tough WP to answer this week!