POKEMON RIDDLE # (I THINK 9?)

i know that i havent done this in a while (long time) sorry for that. i finally came up with one so here it is.

riddle: Though I look like a mouse, I don't evolve at all,
I stay this exact size, cute, fluffy, and small.
My whiskers act like plugs to recharge my spark,
Shining a bright light whenever it's dark.
Who am I?

Answer will be released at 2:58pm.