I dont know what % this would fall under but i think there should be weekly leaderboard since it is constantly changing and I think that would be fun for a leaderboard also this is the only pack without a category so thats just another reason. However, I do see problems with top times being unbeatable because if there was 1 weekly pack with like the best pets ever and it could never be topped I could see how that might cause a problem in terms of the leaderboard having the same top 3 for 2 years or something also i dont know if sap is going to be removing weeklies ever so that might be 1 thing to consider if a leaderboard is decided to be made.