Every time I see 'collect this many items from (insert enemy name here)', I dread it.
Wait till you get to other worlds. I think all of them have a spot where you have to collect so many of an item and it takes forever to do so.
The toughest and most repetitive was in Zafaria, where you have to collect 8 of something from the Lion Fire Ravengers. I kept track of how many Fire Ravengers I had to go up against ........ it took 57. Almost of them I fought by myself (meaning two of them at a time). Towards the end, someone jumped in to help, so I had three to fight in the last battle. I wanted to tear my hair out, I was so frustrated.
It would be nice if we were able to at least collect one item per battle, then it wouldn't seem so repetitive.