Geno's existence Geno strongly prefers to be called magic geno.
Geno and Mario. Geno and Mario were friends. Geno is a character made of wood. He was going to appear, but he was a third-party character.
Geno and Luigi
Geno and Luigi hated each other. You would never see them together, [unless they are fighting]. Luigi and Mario teamed up against Geno. Geno was defeated, and never was seen again. He was a hack character in Super Smash Bros. Brawl. You could get Geno by toggling the random square. This was proven to be false, but Geno was created in Mugen project 3.0.5 as a playable character.