The Final Mizar on the Asteroid is easily the toughest, cheapest Boss in Jet Force Gemini - you'll no doubt die many, many times facing him. There is a trick, though - although it's not foolproof, it's a big help. To do this trick, you need to have at least 40 max Tri-Rockets with Juno. For defeating this Boss, you'd usually fire a Homing Missile when Mizar turns his back, because it almost always hits. Unfortunately, it's also weak, and it can take up to 21+ of these hits to get Mizar to go to this next phase. The trick is to use the Tri-Rocket Launcher when Mizar is flying toward you to do his Fire Claw attack (the one that creates the shockwave). Aim high and shoot once straight into Mizar's body as he comes toward you, and you'll almost always hit AND do more damage, too. If done right, this can cut the hits you need to get him down to his next phase by half. Once he's in his next phase (on the ground with you), start pounding his right (your right) arm with the TRL, until it explodes in a bloody mess; then do the same with the left arm; then do the same with the head, and he's through. Don't forget, Mizar also attacks you too, so here are some tips in avoiding his attacks.