Field Day

Field Day is a button-smashing athletic game unrelated to Track & Field in any way. Nope. Don't bother to compare the two games, no similarities will be found.

Hidden Messages
Three hidden messages are loaded into memory on the main CPU:

Event Names
Text starts at : 120 METER RELAY SOFT BALL THROW THREE LEGGED RACE RING BELL OBSTACLE RACE PUT BALL TUG OF WAR Unlike the even names used in the final game, these are stored in plain text in the ROM. Might have been used for a stage select or some such thing.

Unused Graphics
An early version of the race tracks' player markers and button prompt message are stored near the end of the BG graphics ROM.

The reason for the change is apparent when the early markers are compared with Track & Field's markers. That's some suspicious similarity.

Regional Differences
A few of the fans in the stands are holding Japanese flags in The Undoukai.