Slurp and Flash fusion Slush

At the top is after Flash the orange cat had survived a blast or explosion caused him to be sent into the air and collides with Slurp the slime slug monster. He re emerges out of the top of Slurp's head. Slurp has absorbed some of Flash's limbs to form his own arms, and Flash's tail protrudes out the back, now partly of slime and having a slime webbing dripping off of it. 

Later on, the tail submerged, Flash sank down completely into Slurp, submerged, and merged, then as he reforms he is now Slime and out of the rear end of Slurp causing a CatDog or Push-Me-Pull-You character. With limbs Slurp is able to lift up his body instead of just dragging it along like the said slug.

Slurp the slime slug monster (c)
Flash the orange cat (c)