NHL 99 All cheat codes:
Create a player, and enter one of the following names. Then, click on the check
when the "Player is already in the database" message appears. The newly created
player will now have full attributes.
Dave Warfield, Funky Swadling
Cory Yip, Bryce Cochrane
John Rix, Jeff Dyck
Trent Shumay, Jeff Mair
Paul Martin, Andy Harris
Chris Deas, Lance Wall
Mark Lesser, Hong Chin
Trent Shumay, Bruce McMillan

Type these codes in DURING the game:
MANTIS - Gives players elongated arms, legs, and necks.
NHLKIDS - Makes players kidsize.
HOMEGOAL - Gives home team a goal.
AWAYGOAL - Gives away team a goal.
PENALTY - Causes a penalty.
INJURY - Causes an injury.
ZAMBO - Puts the zamboni on the ice.
VICTORY - Starts fireworks over the rink.
FLASH - Camera flashes from the stands.
SPOTS - Turns on the pre-game spotlights.
CHECK - Every player automatically body checks an opposing player to the ice
upon contact.
GRAB - Similar to CHECK but with a stick hold instead of a check. 
After scoring a goal you can make some various sounds that are heard after 
goals. When the instant replay starts, hit 4 to hear the guy yell.. Keep 
hitting it until you hear the sound you like and hold the button. This also 
works on Shoot-Out Drills, after the drill is over press 4 and the guy will 
yell.

Click the EXIT, go to the Credits, choose programing and type : 
warp9 - Will make the actual speed of the game a lot faster. eaonline - Enables
internet play
headbone - Gives players big heads
buffed - Makes players huge
1999 - Plays the Stanley Cup Video
quicker - All players are fast and good
nobody - Empties the crowd from the arena
gulliver - Makes the goalies very tall
crankit - Unlocks all resolutions for D3D (some resolutions will not work with
some cards)