Input polling

• Default input process:
  • polls input,
  • wait until every button released.
• In-game input process:
  • takes input on input frames 4 times in a row,
  • check input validity and process if it's true else continue processing.

0x41c~0x420 (0x41d is empty) main input processing.
0x421 timer1 starts from 30, decreases after 2 frames on each frame the input is still same.
Once 0x421 becomes 1, timer2 cycles from 8 to 1 and updates "last input" with the preserved input when restarting from 8.
Probably this is the game's method of "auto-firing" while holding buttons.

0x784~0x787 is the in-game input processing which happens after the main input processing which is still active.
Pressing start won't fire in-game input processing for that frame.

Since you can't combine inputs for next processing, you should always start actions right after the last 4th frame (or 4 frames after the 1st one).

Rules

• On specific levels, the player's subpixel position are carried over. Can be monitored by position or object state (start of object structure right after level structure)
• On specific levels, you are required to pick up a key (which requires you to stop and bend over it) before entering the last door.
• Soda can refreshes you with 2 health bar.
• Your own bomb explodes 75 frames later after initializing (which is 4 frames after first B press)
• Throwing a bomb decreases your speed to zero over-time.
• Using special powers (charging forward with Bullwinkle, flying with Rocky) decreases health. You need at least 2 health to perform special power.

Movement system

Vertical movement speed

Horizontal movement speed

• Horizontal speed increase on 5th frame: 19 units per frame, 20 frames + 4 units (1 frame) for maximum speed (384)
• Horizontal position increase: 6th frame: +19, +38, +57...

Horizontal movement speed limits

• 640 @ Bullwinkle/Rocky + pow boost
• 576 @ Bullwinkle charge
• 384 @ Bullwinkle run, Rocky run, Rocky flying, Levitation trick
• 192 @ Bullwinkle stairs
• 0 @ Rocky on stairs... (he can't use stairs)

Movement factor groups

• Stairs: 0 when hit, jumpable
• Bomb (POW): 672 when hit, jumpable
• Red spikeball: 0 as long as you are being hit (inside hitbox), jumping ignored
• Everything else: 256 when hit, jumping ignored

Movement tricks

Optimal stair jumping

Since you can't bypass stairs with 1 jump, you are supposed to either make a two jumps (A*4,empty*2,A*4) or A*4,U*4,A*4. Depending on your position+subpositions and the stair steps positions, one of them probably will have a better value because of the minimally better X/Y trade between jumping (with scaling X speed and Y speed) and stairwalking (192 X speed and slight Y increases)

Horizontal slowdown

L*4 4 frames before touching the ground and D*4 when it won't take additional frames to further reduce speed reducement.

Rocky fly cancelling

If you jump after flying, you can land earlier on the floor instead of waiting your travel time.

POW boost

If you jump from a bomb explosion (saying "POW") hitbox while holding a direction button, your speed will be 640 (672 - 1 frame of speed reduction) units which can be preserved with the speed holding trick.

Speed holding

You can hold a higher speed than your maximum charging speed (576 units) by holding S (or any other button you won't use while doing this) after increasing it, which will still be reduced for 1 frame. Your previous action will be preserved as long as you hold that button. This way Bullwinkle won't try to charge on the ground which would decrease his speed to 576 units

Speed holding after throwing a bomb

Throwing a bomb reduces your speed to zero over-time but you can hold A after throwing it to hold it. The glitch works the same way as holding a higher speed but you need to use A.

Probably useless tricks

Holding bomb

You can start throwing a bomb (B*4) and hold U (U*4) and then do whatever you want, the bomb will stick to your back.

Levitation from stairs

Doing the holding bomb trick starting with U and then jumping lets you levitate with 384 units.

Eternal levitation

If you throw a bomb, fall down to a stair, start levitating inside the wall and getting hit by a bomb and you hold B (only tested pow boost, a positive speed-changing enemy), you can fly up as long as you don't press A*4 (direction not needed because you just preserve the Y boost from explosion which couldn't be altered because of inside a wall). Other than you can get 65536 or whatever high positons, currently seems totally pointless.