E.T.: The Extra-Terrestrial Cheats (GameBoy Advance)

Level 2: Up, Up, A, Down, Down, B, R, L
  Level 3: Left, Up, Right, Down, L, A, R, B
  Level 4: A, Left, B, Right, L, Up, R, Down
  Level 5: L, R, R, L, A, Up, B, Left
  Level 6: L, Left, R, Right, A, A, B, A
  Level 7: B, R, B, L, A, Up, B, Up
  Level 8: Up, Up, A, Down, Down, Left, A, B
  Level 9: Right, B, B, Left, Up, R, R, L
  Level 10: Left, Left, A, L, Right, Right, B, R