Unlockable - Table Tennis Items

After you get the first three princesses your castle will be upgraded again. At this point it will include a table tennis table in the basement area. Examine it and it will ask you if you want to play. Each difficulty you beat your opponent on unlocks a different item. Also each difficulty you beat unlocks the next difficulty.
"Amateur" Difficulty - Beat "Rookie" difficulty
"Pro" Difficulty - Beat "Amateur" difficulty
"World Pro" Difficulty - Beat "Pro" Difficulty
Bamboo Sword - Beat "Amateur" Difficulty
Dried Squid - Beat "Pro" Difficulty
Legendary Undies - Beat "World Pro" Difficulty
Newest Televideo - Beat "Rookie" Difficulty

Unlock Tyrant Mode

Beat the game once to unlock "Tyrant Mode".

Art Piece Rewards

Collecting the 100 pieces of art scattered across the world, will grant you rewards from Ginger each time you reach a certain amount.