Unlock Gate Rally Mode To unlock Gate Rally Mode, you need to accumulate one win in Smack Attack Mode. If you've played, then you know this is not easy. An easier way to accumulate the one win you need is to plug in three additional controllers and play on the space level. The three uncontrolled opponents will always spawn on the upper ring around the level. This leaves them wide open for you to kill, but they're ignored by the CPU controlled players. You should be able to rack up enough points to win by killing these sitting ducks. 

Pen and ink graphics:-  Enter the character selection screen, select "Load" then enter PENCILITIN as a name. 
Plastic graphics:-  Enter the character selection screen, select "Load" then enter FANPLASTIC as a name. 
Ranged weapons:-  Enter the character selection screen, select "Load" then enter GUNSMOKE! as a name. 
Melee weapons:-  Enter the character selection screen, select "Load" then enter MELEEDEATH as a name. 
Hazard weapons:-  Enter the character selection screen, select "Load" then enter HAZARDOUS as a name. 
Personal weapons:-  Enter the character selection screen, select "Load" then enter UNIQUEWPNS as a name. 
Movement power-ups:-  Enter the character selection screen, select "Load" then enter MOVEITNOW as a name. 
All FMV sequences:-  Enter the character selection screen, select "Load" then enter MULTIPLEX! as a name. 

Brian The Brain and Space world:-  Enter the character selection screen, select "Load" then enter BRAINSALAD as a name. 
Alternately, win Smack Attack, Gate Relay, and Flag Relay in all three levels of the Space world.

Count Earl:-  Enter the character selection screen, select "Load" then enter COUNTDEAD as a name. 
Alternately, win Smack Attack, Gate Relay, and Flag Relay in all three levels of the Transylvania world.

Enter the character selection screen, select "Load" then enter EARLSPLACE as a name. 

T. Wrecks and Jungle world:-  Enter the character selection screen, select "Load" then enter TWRECKSPAD as a name. 
Alternately, win Smack Attack, Gate Relay, and Flag Relay in all three levels of the Jungle world.

Whack Angus:-  Enter the character selection screen, select "Load" then enter WHACKFAD as a name. 

Alternately, unlock all modes (Smack Attack, Flag Rally, Gate Relay), then win all three levels in the Desert world in each one (total of nine). After completing the last level, Whack Angus will be unlocked as a playable character. His personal weapons are throwing Butchering Knives. 

Desert world:-  Enter the character selection screen, select "Load" then enter WHACKLAND as a name. 

Big head mode:-  Hold L + R + Up during game play. 

Additional FMV sequences:-  Successfully complete Smack Attack, Gate Relay, and Flag Relay with each character to unlock additional FMV sequences. 

Hints: 

Flag trial:-  You have to have at least one or two of these weapons: the Helicopter and Guns, and the Vacuum. Hurry and find the Vacuum in one of the weapon bins. Go straight to the Winner's (or Flag) Circle and wait for whoever gets all four flags to arrive at the circle. Once they are close enough, just vacuum them up. That weapon will not only take their Flags, but also their weapon. After doing so, go to the "Victory Ring". When you have the Helicopter and Guns weapon, just after the lone Flags first, then take out any one else who has the last desired Flag(s) you need. Next quickly go to the "Ring", because you have a limited time with that weapon. Use the Helicopter And Guns to take out any one who has the Flags, and easily fly to the goal. 

Extinguish fires:-  When Flemming, or any one else with the Lasers hits you a number of times and causes you to go into flames, try going into the water. That will put the fire out if you do so quickly. The levels with water are the first two Jungle levels (the three pounds with the crocodiles, and the other level with the shallow water in the piranha pits), and the first Transylvania level (the creek, before you hit the spider web spring). 

Spin on the ground:-  Go top speed then hold L + R. Press Left or Right on the Analog-stick. If done correctly, you will start spinning.