Bomber Mansion
In order to get the Bomber Mansion you must use your bombs to kill yourself or die from one of the enemies. The professor will say something about training in the Bomber Mansion. Select "No" when asked to continue, and on the main screen you will be able to use the Bomber Mansion to train. The Bomber Mansion is a training place, and when you complete all five levels you will receive a rank. Your score determines your rank. Your score will go down if you lost a heart (you can find them hidden in blocks) or if you place a useless bomb (a bomb that does not explode or kill anything).
Planet Bomber world
Get all ten Lightning Cards from the evil bombers, then defeat the Boss in level 5-4 (Warhorse). The Planet Bomber world will now be unlocked. In it, you will battle two new Bosses (Mujoe and Dr. Mechadoc).
Bonus multi-player battle mode characters
Hige Bandit 2: Get all three Red Hige Hige Cards.
Hige Bandit 3: Get all three Blue Hige Hige Cards.
Hige Bandit 4: Get all three Green Hige Hige Cards.
Mujoe: Get all three Yellow Hige Hige Cards.
Mighty: Get all five Jetters Cards.
Defeating the level 5 area 4 Boss
Put the Charabom (best if at level 3) that uses remote control on, and you must use White Bomber. When battling, wait until he uses his lightning attack to actually damage him. While he using the lightning attack, throw a big bomb near the dragon tail. The dragon tail should then eat the bomb and take two damage. This now makes the Boss vulnerable. You know have the choice of using regular bombs to destroy him one heart at a time or using big bombs. Doing either will work, but you must have the remote control on all the time. If he regains his shield just wait for him to use the lightning attack again. Note: When you defeat the final Boss, you will be able to look at each area on any world and see if you missed any hearts, Hige cards, and Charaboms.
Glitch : Instruction manual
Under the explanation of all the bomb items, it shows a picture of the light bulb but gives the description of the jug. Just next to it, the manual shows a picture of the jug with the description of the light bulb.