4_in_1_(Multi)[Unknown][D40018][Mapper_52][Shadow_of_Ninja] pass 1

game
  crc: 31fbcf63
  title: 4_in_1_(Multi)[Unknown][D40018][Mapper_52][Shadow_of_Ninja]
  board: 52
    mirror: 1
    memory
      type: ROM
      size: 0x80000
      content: Program
    memory
      type: ROM
      size: 0x80000
      content: Character

E: Mapper: 52

ERROR:  Unsupported mapper


4_in_1_(Multi)[Unknown][D40018][Mapper_52][Shadow_of_Ninja] pass 2

game
  crc: 31fbcf63
  title: 4_in_1_(Multi)[Unknown][D40018][Mapper_52][Shadow_of_Ninja]
  board: 52
    mirror: 1
    memory
      type: ROM
      size: 0x80000
      content: Program
    memory
      type: ROM
      size: 0x80000
      content: Character

E: Mapper: 52

ERROR:  Unsupported mapper


4_in_1_(Multi)[Unknown][D40018][Mapper_52][Shadow_of_Ninja] pass 3

game
  crc: 31fbcf63
  title: 4_in_1_(Multi)[Unknown][D40018][Mapper_52][Shadow_of_Ninja]
  board: 52
    mirror: 1
    memory
      type: ROM
      size: 0x80000
      content: Program
    memory
      type: ROM
      size: 0x80000
      content: Character

E: Mapper: 52

ERROR:  Unsupported mapper