Entites rarely (if ever) seen apart and that is usually when one of them is dead. Generally AU versions of Bratty and Catty, Dogamy and Dogaressa and RG01 and RG02 or people in their roles are found here.
“In this fan game, you fight against two monsters: Me, and You. Through the battle, you will...It's You, It's Me
“Bratty and Catty are characters in the AU Forevertale, created by Cinder. They best friends with...Bratty and Catty (Forevertale)
“RS02 and RS01 are a pair of Royal Scientists encountered on Volcano Island. They are the...RG01 and RG02/Shipswap
“This au was created by Undertale fanatic TheBiggestFanOfUndertaleEVER. Ebony and Aster were...Ebony and Aster