Issun x1000 key push
In the Imperial Palace, Issun x1000 can retrieve the lockjaw key from afar. While he holds the key, it retains its collision. If Ammy is in the air while Issun attempts to bring the key back to her, she will be propelled forward by the key. This can be used to get a moderate distance boost. Unfortunately, this is rather inconsistent and difficult to set up, so it's only really useful for saving a fraction of a second when initially grabbing the key.