BANGAI-O TIPS & TRICKS
Cheat mode
Enter 3 Groundhogs (found towards the end of the name entry list of characters) as a name to unlock an extra "Secret Garden" menu at the options screen. This also happens after 44 levels. The extra options are:
Extra option 1
Riki's shot trail thickness: Normal (thin), Thick
Extra option 2
Mami's shot trails: Normal (thin), Thick, Large Missile and Thick (Nintendo 64 style)
Extra option 3
Explosion Fragments: Normal, None, Heavy
Extra option 4
Background: Normal, None, ?
Extra option 5
Invincibility: Off