BOSSES
Stage 1 boss
Specials needed : None
Always quick combo this boss from behind after he swings his fists twice. Dance around him as he moves, and frequently change planes as necessary. When he jumps, you should jump, so his earthquake landing effect doesn't stun you.
Stage 2 boss.
Specials needed : (at least) 3 B specials.
Stay far away from the lady as she spits out bugs. Stay off of the plane of where her bugs are landing. Use a B special from a distance. This should create enough pushback that will allow her to give birth to more bugs off screen. On the appropriate plane, B special again. When she's still spawning bugs, B special again. At this point she may jump toward you. As she lands, walk or jump toward the opposite plan she is on. As she gives birth to more bugs, quick combo her from behind.
Stage 3 boss
Specials needed: None
Dance around this guy, and jump from plane to plane. After he extends his arm twice, quick combo him from behind. Repeat. After he receives enough damage, his mechanical face will be exposed and he will perform an arm extend attack or maybe a foot sweep. Move away. If you are in mid combo while his face becomes exposed, end the combo and quickly plane jump to avoid his arm extend attack. Proceed to quick combo from behind until he's dead.
Stage 4 boss
Specials needed : None
Never allow your character's sprite to go too far to the left or right of the screen. Don't get cornered. Move around the screen from plane to plane as the boss crawls around. Make sure your characters sprite is never face to face with the boss at a close proximity. Always be prepared for this bosses running attack. By creating enough distance and varying the planes you're placed on will minimize the chance of getting hit by this attack.
Allow the boss to climb on the ceiling. Place your character on the northern or southern most plane as needed. The boss will then drop down bombs that will target you and create pillars on fire on the ground. Move away from where the bombs land, and away from the shadow on the boss hanging from the ceiling. He will drop down. The pillars of fire will start to flicker, enabling you to pass through them. Pass through the flame pillars as they flicker, and quick combo the boss from behind ONLY when he swings his claws twice. This process must be repeated until death. Beware, once this boss receives enough damage, his mechanical face will be exposed, and he may attack. If his face is exposed mid combo, stop the combo and quickly switch planes.
Stage 5 boss
Specials needed : none
As soon as you drop down from the ceiling, quick combo the boss in the white suit. His clone in the brown suit will stand to the left with a ring of clouds surrounding him. Eventually the brown clone will target you. His clouds will hurt you, and can hit you on multiple planes, i.e. (southern most and middle OR northern most and middle. Walk around the screen to avoid the clouds, and never remain in a corner. Try to wait for the white boss to float to the southern most plane. Quick combo him from the front, delaying your taps to inflict damage as quickly as possible. This boss gives me the most trouble.
Stage 6 boss rush
Part 1: Specials needed (at least) 1 D special.
This boss fight throws the bosses from stage 1 and 3 at you at once. As soon as the fight begins, use 1 D tornado special (which should have been obtained in the fourth quarter of stage 5). After the enemies have been knocked down, grab the B special on the center-right part of the stage. Apply the previously recommended tactics for both respective bosses. This can be a bit tricky. Try to focus on killing one boss (it doesn't matter which one) as quick as possible (delaying taps in the quick combo).
Part 2: Specials needed (at least) 3 B specials.
Stage 2 bug lady again. Apply the same strategy from the previous stage 2 encounter. Don't bother grabbing the A special on the ground (even if you think you need the health). Chances are, after you're done using the 3 B specials, the A icon will have disappeared.
Part 3: Specials needed A (optional).
This is the stage 4 boss. Try to grab the A special from the ground as quickly and safely as possible. It's important to grab this for health. You can use the special on this boss when he is not hanging on the ceiling, but it's pretty weak. Apply the same tactics illustrated previously.
Part 4: Specials needed None
Stage 5 boss again. Don't be tempted to grab the A special on the ground. Apply the same tactic as illustrated previously.
Part 5: Specials needed None
Line yourself up with this boss face to face at a distance. He'll transform into a monster. Stand where you are and tap A at a medium and steady pace. Don't stop, don't move. This boss will keep walking into your punch, back off to swing his arms twice and breath fire, and will continue walking into your punches. You might have carpal tunnel after the fight, but this strategy is fool proof.