Overview
Retsu is a CPU Fighter in Street Fighter. Though unplayable in the vanilla build, he has been made playable in the SF1++ hack. He is often considered a high tier with good defense and damage, but he struggles in a few matchups, especially against top tiers.
In SF1++, Retsu is selected by holding 
at the title screen or VS. Screen and pressing Start.
Matchups
Adon
Birdie
Eagle
Geki
Gen
Lee
Joe
Mike
Retsu
Sagat
Shotos
Misc.
Retsu can crouch by pressing 2, but it's only temporary. It does lower his hurtbox, but MK is generally preferred for ducking.