Marior Bros by Nintendo is a platform game whic has been ported by Choice Software on Amstrad CPC in 1987. Sadly it was a ZX Spectrum port, see original loading screen and game screenshot :

Today there is a new version Mario Bros 2023 (local download in DSK, CPR and CDT) by JMB (codefix), Onevision (GFX) and Lunoka (music). You can check below the difference :

You can see two videos of Mario Bros 2023 on Youtube by :

• Saberman
• Amstrad Maniaque (see below)