- Bonus powerful weapon
Do not trade in your Polar Star for the machinegun when given the option. Instead, you can trade in your Polar Star and another weapon for an extremely powerful weapon later in the game.

- Alternate endings
Successfully complete the indicated task to view the corresponding ending:

Bad	Leave with Kazuma after your second time through the Egg Corridor.
Normal	Successfully complete the escape sequence without going through the Sacred Grounds.
Good	Successfully complete the escape sequence with going through the Sacred Grounds.

Make the rocket that allows access to the last cave, but do not talk to Momorin to get the booster back. Use the rocket, and keep the Mimiga Mask.

- Bubbler weapon
Get the Jellyfish Juice, then use it on the fireplace in the Assembly Hall in Mimiga Village to get the Bubbler weapon. While it is equipped, keep pushed Down to form a total of one hundred bubbles that deflect blockable enemy attacks and cause a lot of damage because of all the sharp stars it releases. It is very useful when fighting a lot of enemies, such as the hordes of birds that attack you in the Sand Zone. Try using it while in the Labyrinth and an enemy traps you by jumping up and trying to attack. You can remain in any location and charge up the Bubbler; it will release the stars and hit the enemies for you. In the Sand Zone, use it as a shield and launch the stars. You can even use it to get the Arms Barrier. While fighting Monster X and he releases the heat-seeking fish-like missile projectiles, the Bubbler will protect you and destroy them in one hit. You can also use it against Balfrog to block all his missile attacks.