Eevee Slime

"This slime does not evolve like its Pokemon counterpart."

Slimepedia Entry
The Eevee Slimes are rare and cute, but unlike there Pokemon counterpart they don't evolve unlike regular Eevee. There look is based off the Tabby Slime because the ears and the "uncontrollable butt wiggles" on the Eevee Slime.

Plortonomics
Eevee Slimes do not produce plorts, but an object known as a plort called "The Evolutionary Stones" known as the Water Stone, Thunder Stone, Fire Stone, Mind Stone, Dark Stone, Leaf Stone, Ice Stone and Fae Stone.