A brain-dead way to defeat any of the Blumebears is to make a very tight circle around it while firing away. The Blumebear will come to a complete standstill while its turret futily tries to keep up with you. Of course this only works if you can actually get close enough to one to circle it.

You should be able to avoid its attacks if you keep your distance. You can prevent Tron from destroying buildings by standing so that she always shoots toward the outer walls of the city, which are indestructible.

To defend City Hall, pace between it and the bank and the police station destroying tanks. Splash Mines work pretty well here since it's fairly easy to drop them such that the tanks roll over them (or just toss mines directly onto the tanks themselves). Aim at the ships in the air whenever possible; they are dropping more tanks. (No, not that ship! That's the news blimp!) Keep pacing to make sure you get them all-until the music stops, you know there is at least one more tank out there somewhere. To take out Bon Bonne, circle him until he attacks, then stop when you are behind him and lock on. If he fires missiles, run.

Once you destroy the treads (a couple of Splash Mines will do the trick), there are two keys to winning this battle smoothly. One, get onto the back of the tank as quickly as possible-it can't fire the white spheres at you when you're up there and they by far do the most damage (one hit destroys your shield). Two, be sure you are firing a steady stream at the hatch the instant it opens, because they are going to be throwing attacks at you out through the door and if you don't destroy them on their way out, you're likely to be knocked clean off the Marlwolf. Buster Parts that enhance your Energy rating (to give you a more steady stream of shots) are probably more important here than Power. Once you accomplish this, staying on the Marlwolf is a simple matter of watching its shoulders to see which arm is raising so you can sidestep to avoid the arm swipe.

Defeat the little ships, then choose "Retreat" and get right back on the boat. This will restart you at the final ship boss with full health.

I found the Active Buster to work wonders here. Even upgraded only slightly, it can take out the initial Drache ships in about three hits each. At the very beginning, when facing the little ships, walk to the edge of the Flutter and wait until they gather into a line, then start firing the Active Buster. The ships should all go down before they even get a chance to move out of formation. The Active Buster also does some serious damage to the Gesellschaft itself and the falcon ship that comes after, although you're likely to be out of ammo for it by that point (unless you've upgraded it to infinite).

Note: If you saved the game after activating the Main Gate, you'll be unable to get back to town until you beat the Bonnes. Should you discover yourself having troubles defeating them, you are left with few options. Make sure your Energy Canteen is full before you activate the Main Gate. Also, if worst comes to worst and you're trapped at Clozer Gate, use the entrance into the Portals to reset the enemies so you can make lots of cash quickly, then upgrade your Active Buster. Keep doing this until it's powerful enough to win the battle.

To take down the Bonne's airship, follow Roll's instructions and fire first at the belly of the craft, then the engines on either wing. Basically shoot at anything that flashes when you hit it. You'll also need to fire at cannons which are shooting bombs at the Flutter. You should be able to destroy each section of the Gesellschaft on your first pass through. At the end you need to fire at the skull marking on the front. You're liable to take some damage here unless you're extremely powered-up. My recommendation is to stand back a bit and allow the Flutter to take the brunt of the attack-you'll lose enough health later on.

The final bird-like ship is by far the most dangerous part of this battle. Tron doesn't remain still very much so you'll have to learn to attack her on the move as well, and to do this you need to aim slightly in front of Tron's flight path in order to score any hits. Dodge the missiles as best as possible; destroying them sometimes takes more effort than it's worth. You can afford to let the Flutter take some damage as long as its health isn't terribly low; for the most part Tron's attacks do not harm the Flutter as much as they hurt you.Bruno: [Old City]

Hide behind buildings (the Subcity entrances are superb for this as they cannot be destroyed, unlike most of the rest of the structures in Old City) and use range-increasing parts to shoot from a distance. Strive at all times to stay behind the monstrosity since then it won't attack you as much. Aim for the robot's shoulders and midsection; the cannons on the shoulders can be destroyed, and hitting the narrow midsection inflicts damage on the robot's energy meter.

Use the Ultimate Technique. If you keep moving the only attacks that will hit you are the circular shockwaves on the floor, and the multicolored beams he fires in a sweeping circle ("How about this?"). If you get to know his attacks you will know when to jump to avoid the shockwave (whenever he jumps mostly), and jumping high while circling will usually avoid the beams (you may have to jump twice depending on what mode you're on). When he stops for significant periods of time, for instance while coming up out of the blue light in the floor, stop and pump him with shots and/or special weapons. Just remember to jump the shockwave.

Use the Ultimate Technique and jump after every attack he throws. The reason you want to jump is many of his attacks leave streamers along the floor that will hit you even if the actual attack misses (which it will if you keep moving). If you do this, the only attack that is dangerous is the one where he fires rapid multicolored beams from above. In this case, you want to make small hops over the initial shockwave(s) that travel along the floor, then start running. If you keep moving, the beams will miss you; however sometimes when circling you'll still be hit. If this happens, try running forward instead. Also stay as far away from Juno as possible because even his flailing arms will do damage if you get too close.