Poison/ Veneon
I can see it(literally) It looks like Glaceon, but light purple, and it's ears are shorter with ends that are dark purple. Paws dark purple, it's fur has small patches of black spikes(like Jolteon's fur) and the end of its tail looks like a curved blade.
Evolves into Veneon by training in a swamp at night.
Imagine A grey eevee. It'd be awesome!