Kingdom Hearts HD 1.5 ReMix - Pink Agaricus (100 Hits)
Credit to: http://www.gamefaqs.com/boards/684080-kingdom-hearts-hd-15-remix/67254009
The reason why there is a hole in the Treehouse is because when you fight Sabor here after Clayton tries to shoot Terk, but before you fight the Powerwilds, Sabor will create a hole when you fight him here. It is missable though.
Yes, this is possible when you get Donald and Goofy stuck with and without the hole being there. To get Donald and Goofy stuck without the hole, summon at one of the sides of the Treehouse after the Pink Agaricus spawns. Also Prime Cap is a accessory it can drop only when you reach 100 hits on it.
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