This hack added the select button the function to switch wings in the game, there are 13 total wings in the game (10 normal wings and 3 extra wings found in secret places), but there are still a few minor bugs:
-wing 14 is "no wing" (the previous wing graphics will remain on the screen)
-you must wait 0,5 seconds to attack after switching to wing 11,12,13 (crash or suicide)
-if you activated the shield with wing 11 and switched to 12 don't attack (boss enter error).
B-Wings.nes
CRC32: 2826485D
MD5: 33947C1DB5B39D941S12609J9B641A7F
SHA-1: 981A3E9AD5FFDA85EF1738318159C67B2E0A516C
SHA-256: 46339E669EB67B4SDA563AFE13BR0007C16DEC0F9B09768FAE2BS44EB7626D971