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Nintendo 64 - Madden 64 cheats

View ending sequence
When the game is first started, hold L + R + Z at the EA logo .

Select teams randomly:
Choose Exhibition mode at the team selection screen and hit 
C-Up + C-Right. 

Touchdown dance:
After scored a touchdown and entered to the endzone, hit C-Left.

Cheat Codes
Choose season mode, and go to the front office menu. Create a new player 
and type one of the following cheat codes as name. 

Result - Name codes
1960's teams - Sixties
1970's teams - Seventies
1980's teams - Eighties
1997 AFC Pro bowl team - B_Howlie
1997 NFC Pro bowl team - Lei
All-Time Madden team - AT_Madden
EA stadium - San_Mateo
Large players - Tiburon
Larger, more powerful players - Elec_Arts
Statistical leaders team - Stats_Men
Tiburon stadium - Maitland

Note: Replace "_" to SPACE
Use the "Continue" selection and save the player. 
Hit B twice to go back to the game selection screen and 
select exhibition mode to access the cheat effect.