I think I've accidentally discovered something interesting.
Yesterday,I downloaded the lion king II from freeroms (if I remember correctly).I heard somewhere the ROM images of this game had a bug: lifebar and lives do not drop when you're being hit,but in my version (emulated with picodrive on psp) when I lost all the lives,a 'CONTINUE?' screen appeared.Simba was hanging from a rope,trying to goo up (no,he wasn't committing suicide,he was trying to climb).I choose 'NO',the rope broke and he fell,then 'GAME OVER' appeared.You can still find the rom with invincibility at pride-lands.ru in the games section
