Bubble Bobble Old and New
  
Game Boy Advance
  






Constant E-X-T-E-N-D bubbles:


At either the "Old" or "New" Main Title Screen, enter: Up, Up, Down, Down, Left, Right, Left, Right.





Original Mode in "Old":


At the "Old" Main Title Screen, enter: L, R, L, R, L, R, Right, Select.





Power-up Mode in "Old":


 At the "Old" Main Title Screen, enter: Select, R, L, Left, Right, R, Select, Right.





Super Game Mode in "Old":


Beat the boss in Super mode with 2 players. At the "Old" Main Title Screen, enter: Left, R, Left, Select, Left, L, Left, Select.





Original Mode in "New":


At the "New" Main Title Screen, enter: L, R, L, R, Left, Select, Right, Select.





Power-up Mode in "New":


 At the "New" Main Title Screen, enter:  Left, Left, Left, L, Right, R, R, L.





Super Game Mode in "New":


Choose a save file, then go to the "New" Main Title Screen. Enter: Right, R, Left, L, Select, R, Select, L.






Thanks to Revolution readers ol'skooler!