Nevermind, the fact that destroying one of them only made things worse as it didn’t actually destroy the enemy itself but instead made both fuckers go even faster. And due to their size and speed, it’s almost impossible to get out of their way (and that’s before they decide to hit the fast forward key mid way through the fight).
That said, @Xenogears hard fight: Humorously enough, I beat both bosses on my first attempt without too much trouble. I ended up using only two of the Gear’s Hyper Modes to get through the first fight and I had my remaining Gear (I know it wasn’t Barts) who slammed the second fight in Hyper Mode while one of the others gassed up (Barts) and the third using Ethers and defending. After a while I think I started losing Gears but Barts had enough fuel to go into Hyper Mode at that point and finished off Miang’s Gear.
But during the time I played this on the N64 years back, defeating her was like crazy hard! (Beating Ganondorf in the Legend of Zelda: Ocarina of Time, was easier than her!.. seriously.) The first one wasn’t as bad as the second one though! There was heaps you had to watch out for and the air itself slowly lowered your health (because of poisonous fumes.)