Find all 40 Spritelings before beating the final boss to get the best castle (and best ending).
Infinite Coins
When fighting DinoMighty, grab her tail and wait until she raises it above her head. Perfom a Ground Pound (A + R Button). She'll drop a lot of coins. This stuns, but does not damage her. Repeat as often as you like to get an inifinite number of coins.
