In this video, I cover getting all the Teensies and Cups for the "The Shaolin Master Dojo" level of "Rescue Emma" contained within "20,000 Lums Under the Sea".
This level is not quite five skull difficulty in my opinion, but it is still fairly hard, especially if you're like me and are doing it all on one life. Fortunately, if you die you'll restart at the most recent challenge with your time intact, so you should be alright.
0:44 - So long as it is the last thing to be collected for the particular challenge you are on, a downward slam attack won't kill you but may save you some time.
1:09 - Try to make your jump as low as possible here, as that spike ceiling is likely to get you otherwise.
2:28 - I'm not 100% sure, but I think Emma's suit may be a reference to Kill Bill. I thought it might've been a reference to Charlie's Angels since I thought I remembered some iconic yellow suit (plus the whole spy aspect of Emma and Ursula), but now I'm not so sure...