Hold the A + B, then press Reset. If CRC is fine, "HINOTORI ONE" will appear; otherwise, "HINOTORI TEN" will appear.
First, you must meet several conditions. One is to hold exactly 50 stone blocks. Another is that your score must be in the form of "##23450" - for example, 1223450. Once both are met, when the timer reaches "100", press Up, Right, A, and B, and hold them to bring your lives counter to 90.
In Future World level 1, fall off the ledge just after the long waterfall near the end. Just before you leave the screen, use a gargoyle block to stop your fall. Break the blocks at the bottom to find Konami Man.
In Prehistoric Times level 1, you will eventually find three chests, the lowest of which contains Konami Man. To reach it, use the chest directly above it to get a mirror. Pass through the branch and fall off the ledge. Use a gargoyle block to stop your fall, then turn and shoot at the chest to find Konami Man. Quickly exit before the effects of the mirror wear off.