All-Star Tennis '99

D016E1D1 0020 P1 Press L For P1 Score Modifier
801C7260 00XX

D016E1D1 0010 P1 Press R For P2 Score Modifier
801C7261 00XX

D016E1D7 0020 P2 Press L For P1 Score Modifier
801C7260 00XX

D016E1D7 0010 P2 Press L For P1 Score Modifier
801C7261 00XX

Replace XX with:
00 0
15 15
30 30
40 40

Stats Modifier Codes
811687B2 ???? Aces Modifier P1
811687B4 ???? Aces Modifier P2
8116E296 ???? Double Faults Modifier P1
8116E298 ???? Double Faults Modifier P2
81147C58 ???? Points Won Modifier P1
81147C5A ???? Points Won Modifier P2
81167388 ???? Fastest Serve Modifier P1
8116738A ???? Fastest Serve Modifier P2
801BBFA2 00?? Games Won Modifier P1
801BBFA3 00?? Games Won Modifier P2