1. In Pirate Panic, go into K.Rool's cabin (don't collect the balloon) and then leave.
2. Jump over the first two bananas, then collect the next bunch on top of the barrels. Still avoiding the first pair of bananas, return to the cabin and grab the balloon.
3. Jump over the first two bananas, then collect the next bunch on top of the barrels. Still avoiding the first pair of bananas, return to the cabin. You'll see a floating Kremcoin in the air. Grab it to collect all 75 Kremlin Coins.