Answer:
I am a busy worker who is a water mammal.
I am enjoyed by some despised by others. Some take me for granted some treasure me like a gift. I last forever unless you break me first.
I smell like blue paint pours like green paint and I look like a red truck.
I invade your home once a yearโฆbut only if youโve been good.
I can generate fear and some say I come out of your ears. I am as quiet as a mouse but not welcomed in the house.
i'm popular for Knuzlocks what am i