The following are known Action Replay Codes for High Heat Major League Baseball 2002 on Nintendo Game Boy Advance (GBA).
These codes were also known as GameShark Codes and in most cases will work on both devices.

These codes are for the U.S. version of the game.

Master Code – Must Be On
7d037727
9c3a0293
578cc1fc
8d0821c0

Away Team: Score 50
523629b1
5de571e5

Away Team: Score 0
8188e078
48eafc52

Home Team: Score 50
ba45b8d3
734aeb6e

Home Team: Score 0
c747223d
916430d3

Never Strike Out
1b434c4c
d3ae3a80

No Balls
e8c02d02
1e5cc1b4

No Outs
e82a3ae5
59828c07