Unlock "Extra Mode":
Complete all 35 stages on "Slippery Slip mode". (In "Extra Mode" you can play with the levels rotated 45 degrees to the right).
Unlock "Father" trophy:
Beat all Kururin Father stage times
Unlock "Gold Helirin":
Perfect Coin Complete All Stage in Adventure mode
Unlock "Hero Helirin" and "Witch Meter Design":
Finish all stages in Challenge mode
Unlock "Kururin's Brother's video level records":
Play on any stage of any world, and then go on the Shop of each world.
Unlock "Kururin's Father video level records":
Finish "Adventure" mode. After beating the game, you'll be able to buy all 50 Kururin Father's video level records from the Shop.
Unlock "Platinum Helirin":
Perfect Coin & No Damage Complete All Stage in Adventure mode
Unlock "Professor" trophy:
Beat all Professor Igashi stage times
Unlock "Slippery Slip mode":
Finish "Adventure" mode. (In "Slippery Slip mode" you play with Helirin without rotate wings).
Unlock "Teacher" trophy:
Beat all Rabbit Teacher stage times
Unlock "Turn to Advance" GBA connection quiz mode:
Go to any Shop and buy the GBA item for 30,000 coins.