Sheven and Stadow:

Sheven is the blue one:

Stadow is the Black one:

Alternate versions for Sheven and Stadow:

Stavedow:

Shevadow:

6 of these fusions will have the same transformations as both Steven and Shadow do

Sheven and Stadow's Super Fase 4 (this also counts for Stavedow and Shevadow) and Limit break and Super God Blue and Ultra Instinct.

(They can also use Super God White Omni Forms)