UEFA Dream Soccer cheats and cheat codes for Dreamcast

Press the following button combinations at the arcade mode menu:

Tiny players:
Press Down, Up, Left, Left, A, Right, Down, Start.

Silicon Dream teams available:
Press Y, A, B, B, A, Down, A, B, B, A, Down, Up.

All-Star teams available:
Press Start, A, Y, Up, Right, B, A, Down.

Stadiums: 1, 2, 5, and 11 available:
Press B, Up, Y, Left, A, Right, Down.

Stadiums: 3, 7, 10, and 15 available:
Press B, A, Left, Left, Start, B, A, Left, Left, Start.

Stadiums: 8, 13, and 16 available:
Press B, A, Right, Start, B, A, Right, Start.