Two-Player Practice Mode

You need two controllers for this (duh). Make sure they are plugged into the first two ports when you switch on. At the main menu, move the joystick to Practice mode. Now press A and hold it on both controllers, simultaneously. If you performed the code correctly, when you choose a team, both player selectors will appear in the left-hand column.

We've sorted out all of the actual size codes for both heads and body sizes here in detail, so check it out. At the Options screen, press any C button, hold it, and press the R button. This bringes up 16 zeros at the bottom of the screen. Here's what the C buttons do: down changes head size, left changes body size, and up changes height.

Body Sizes
Butterball Players -- Press the upper C button and press the right shoulder pad until the fifth numeral of Specials options reads 1.

Giant Players -- Press the left C button and press the right shoulder pad until the fourth numeral of Specials options reads 1.

Midget Players -- Press the left C button and press the right shoulder pad until the third numeral of Specials options reads 1.

Beanpole Players -- Press the upper C button and press the right shoulder pad until the sixth numeral of Specials options reads 1.

Head Sizes
Giant Heads -- Press the bottom C button and press the right shoulder pad until the first two numerals of Specials options read 01.

Big Heads -- Press the bottom C button and press the right shoulder pad until the first two numerals of Specials options read 10.

Tiny Heads -- Press the bottom C button and press the right shoulder pad until the first two numerals of Specials options read 11.

Before picking teams, go to Setup, then Options. Hold the L button down and push RLLRLLRLL. Specials, followed by a string of numbers shows on screen. Now go play the game and there will be an extra northeast division that will have the following teams: Gretzky team (his choices), Team USA, Team Canada, and Williams Entertainment team.
Trick: Unfortunately, you can't play a full season with the super teams. But, and this is a big but, you can trade all of the super team players to a regular team and then go through a full season.

Upon starting the game, go to Setup, then Options. Hold L down and push DDUUDDRRD (on the C-pad) then go to the Records, and then access Team Stats. Now press the C button up 10 times and a special Modify Teams menu appears.
Skip using the analog joystick. Use the D pad to choose two teams, and then press A. By pressing A, you can alternate the teams on the left, and by pressing B, you can alternate the teams on the right. Once both names are highlighted, press A to trade. Press Start when you're finished.
Like we said in the Super Teams Code, you can't play a full season with the super teams, but you can trade the super team players to regular seasonal teams (for season playing using this technique.

Non-stop Fighting This is cool if you just want to fight all the time, because, in fact, you'll be fighting every second with this code on. Good to surprise a friend, maybe.
During a game, go to the Options menu and highlight fighting. Then hold L (left) and press these C buttons in this order: RLLRBTTBLRRLRL. R=right, L=left, B=bottom, T=top.
If you've entered it correctly, a string of zeroes will appear on the bottom of the screen.

To get ads at any Options screen, press "Z" for an advertisement that will scroll across the bottom of the screen.

During the face-off before actual gameplay, pause and go to Replay. Make a player flash by pressing the L or R buttons, each time you press another player will be highlighted. While a player is flashing press the "Z" button. He will disappear, and if you want you can make all of the players disappear.