FMA x Kimetsu no Yaiba fusion : r/FullmetalAlchemist

Fullmetal Alchemist Brotherhood USA Official Website

How would you rank these anime: Attack on Titan, Code Geass, Hunter x Hunter and Fullmetal Alchemist Brotherhood? - Quora

Demon Slayer: Kimetsu no Yaiba Action PVC Statue Tanjiron Kamado 30 cm

Fullmetal Alchemist crossover : r/TheLastAirbender

Demon Slayer: Kimetsu no Yaiba Figma Action Figure Giyu Tomioka 15 cm

Charizard x Gengar Fusion-Artwork by @Creativity_Artopia

Bulbasaur x Charmander Fusion-Artwork by @Creativity_Artopia

Nanoblock NBCC-088-094&110-116 : Demon Slayer: Kimetsu no Yaiba Part 1+2 (Set of 14)

Gon Zombie Hunter x Hunter-Artwork by @Creativity_Artopia

FMA x Kimetsu no Yaiba fusion : r/FullmetalAlchemist

Demon Slayer: Kimetsu no Yaiba SPM PVC Statue Kanao Tsuyuri 17 cm

Fullmetal Owlchemist by Garth2The2ndPower on DeviantArt

Demon Slayer: Kimetsu no Yaiba FiguartsZERO PVC Statue Genya Shinazugawa 17 cm

Fullmetal Alchemist is quite similar to this series : r/DemonSlayerAnime