Freaky Flyers Cheats

In the beginning of Coyote Canyon on your right will be a town.In that
town there will be a girl being hanged. Free her by shooting her and
it will say you've unlocked Cactus Rose. 

In the Bandito Attack level, go around the course and look for a movie star. Shoot him to unlock Atomic Johnny.
In the Danger Island level, in the jungle area fly by or shoot the snake on the vine to unlock Island Jack.
In the Torpedo Run level, look on the radar. There will be two blips. Go left and shoot the yellow submarine to unlock Professor Guntentaag and Sven 209.
In the Cave Of Blunders level, fly down near the ground. If you see two people; a big man in black who is trying to kill Sheik Abdul. Shoot the killer to unlock Sheik Abdul.
In the Cave Of Blunders level, complete the level perfectly by flying through the left doorway of the castle to unlock the Genie.
In the Thugsville level, fly into the first train tunnel and get the unlock signal to get the Purple Gremelin for race and dogfight mode.
In the Grave Danger level, shoot the tombstone on the left side of the graveyard to unlock Baron Von Slaughter.
In the Monster Isle level, look behind the buildings on the left side to unlock the Rubber-Suited Monster.
In the Monster Isle level, kill the monkey ninja near the roof of bamboo forest shrine to unlock Sammy Wasabi.
In the Coyote Canyon level, in the cave look up at a purple thing. Shoot it and go up. Look for an unlock signal to get the Bandito for race and dogfight mode.
In the Coyote Canyon level, go down to the cowboy town. Look for a girl that is going to be hung. She is Cactus Rose. Shoot her to unlock her.
In Bigfoot Mountain level, go straight at the start. You will see a house. Shoot the snowman to unlock Andre Latoilette.
In the Bombsburg level, fly through the building on the left side of the factory entrance to unlock Marcels Moreso.
In the Bombsburg level, Queen can be unlocked on the right side in a pipe after exiting a tunnel.
The following characters are unlocked by completing all goals and finishing in first place in a race on the corresponding level:

In the Bandito Attack level, go around the course and look for a movie star. Shoot him to unlock Atomic Johnny.
In the Danger Island level, in the jungle area fly by or shoot the snake on the vine to unlock Island Jack.
In the Torpedo Run level, look on the radar. There will be two blips. Go left and shoot the yellow submarine to unlock Professor Guntentaag and Sven 209.
In the Cave Of Blunders level, fly down near the ground. If you see two people; a big man in black who is trying to kill Sheik Abdul. Shoot the killer to unlock Sheik Abdul.
In the Cave Of Blunders level, complete the level perfectly by flying through the left doorway of the castle to unlock the Genie.
In the Thugsville level, fly into the first train tunnel and get the unlock signal to get the Purple Gremelin for race and dogfight mode.
In the Thugsville level, shoot the box with the British flag located under the bridge on a ship in the dock to unlock Margareta Basher.
In the Grave Danger level, shoot the tombstone on the left side of the graveyard to unlock Baron Von Slaughter.
In the Monster Isle level, look behind the buildings on the left side to unlock the Rubber-Suited Monster.
In the Monster Isle level, kill the monkey ninja near the roof of bamboo forest shrine to unlock Sammy Wasabi.
In the Coyote Canyon level, in the cave look up at a purple thing. Shoot it and go up. Look for an unlock signal to get the Bandito for race and dogfight mode.
In the Coyote Canyon level, go down to the cowboy town. Look for a girl that is going to be hung. She is Cactus Rose. Shoot her to unlock her.
In the Bigfoot Mountain level, go straight at the start. You will see a house. Shoot the snowman to unlock Andre Latoilette.
In the Bombsburg level, fly through the building on the left side of the factory entrance to unlock Marcels Moreso.
In the Bombsburg level, Queen can be unlocked on the right side in a pipe after exiting a tunnel.

On the last level in Adventure mode, beat Pilot X by destroying his robot.

In the Bandito Attack level, go around the course and look for a movie star. Shoot him to unlock Atomic Johnny.
In the Danger Island level, in the jungle area fly by or shoot the snake on the vine to unlock Island Jack.
In the Torpedo Run level, look on the radar. There will be two blips. Go left and shoot the yellow submarine to unlock Professor Guntentaag and Sven 209.
In the Cave Of Blunders level, fly down near the ground. If you see two people; a big man in black who is trying to kill Sheik Abdul. Shoot the killer to unlock Sheik Abdul.
In the Cave Of Blunders level, complete the level perfectly by flying through the left doorway of the castle to unlock the Genie.
In the Thugsville level, fly into the first train tunnel and get the unlock signal to get the Purple Gremelin for race and dogfight mode.
In the Thugsville level, shoot the box with the British flag located under the bridge on a ship in the dock to unlock Margareta Basher.
In the Grave Danger level, shoot the tombstone on the left side of the graveyard to unlock Baron Von Slaughter.
In the Monster Isle level, look behind the buildings on the left side to unlock the Rubber-Suited Monster.
In the Monster Isle level, kill the monkey ninja near the roof of bamboo forest shrine to unlock Sammy Wasabi.
In the Coyote Canyon level, in the cave look up at a purple thing. Shoot it and go up. Look for an unlock signal to get the Bandito for race and dogfight mode.
In the Coyote Canyon level, go down to the cowboy town. Look for a girl that is going to be hung. She is Cactus Rose. Shoot her to unlock her.
In the Bigfoot Mountain level, go straight at the start. You will see a house. Shoot the snowman to unlock Andre Latoilette.
In the Bombsburg level, fly through the building on the left side of the factory entrance to unlock Marcels Moreso.
In the Bombsburg level, Queen can be unlocked on the right side in a pipe after exiting a tunnel.

When you hold the triangle button and flick (or hold) the analog stick/directional pad up, down, left or right. (regular plane controls) You get...

triangle + up = "Dive Bomb" (pull up to stop the dive bomb when you desire)

triangle + down = "Somersault" (you use this in the mini game "Torpedo Run". You can't cancel out of the somersault when it's going. When you are accelerating you do a big one and a small one when not accelerating)

triangle + left = "Left Barrel Roll" (it will make your selected character do two rolls when you do this. When you hold the analog stick longer the left, you do a longer barrel roll. You'll automatically stop at a certain time when you can not barrel roll any more. It sort of works when you want to stop doing a dive bomb except that you continue going for one or two rolls then stop.)

triangle + right = "Right Barrel Roll" -see "Left Barrel Roll" description-

When you hold the L1 or R1 or both buttons and turn in the direction you want (left or right); you'll make sharper turns.

L1/R1 or both + triangle + down = "About Face" You turn around and fly in the other direction you were flying.
This is good to use if you accidentally go the wrong way. Holding L1+triangle+down makes a slow "About Face" You stay in that one spot and turn slowly (which wastes time) if not in Torpedo Run.
Holding R1 plus the other buttons make a fast "About Face" but it still takes longer.
Using L1/R1 plus the other buttons will make the best "About Face" you can do. So I recommend doing L1 & R1 + triangle + down combo.