My favorite is this kettle. Check out the adorable back! Even the knob for the lid is shaped like Pikachu's head! Boiling water in this every morning would be sure to put a smile on my face.
And since I'm on the subject of kitchenware, I thought I'd give this Rilakkuma espresso machine a mention:
Certainly it'd be much better if it were bright yellow with Pikachu's face on the front!