Two planeswalker questions:

[Coffee Vampire]

Hello, I have two questions about planeswalkers:

1) If I mimic a planeswalker while it is a  creature, does it lose its abilities when I put out a copy of that planeswalker by paying (3) and tapping {Mimic Vat}?

2) If I want to deal damage to a planeswalker that my opponent controls, do I say that I am attacking him, then after any damage goes through, I say to deal it to a planeswalker instead, or do I say first that I am attacking the planeswalker?

[BlackJester]

Hello, I have two questions about planeswalkers:

1) If I mimic a planeswalker while it is a  creature, does it lose its abilities when I put out a copy of that planeswalker by paying (3) and tapping {Mimic Vat}?

The token the Vat creates will be an exact copy of the Planeswalker.

2) If I want to deal damage to a planeswalker that my opponent controls, do I say that I am attacking him, then after any damage goes through, I say to deal it to a planeswalker instead, or do I say first that I am attacking the planeswalker?

No, that's how it works for direct damage. You divide your attacking creatures by who they are attacking.

[Coffee Vampire]

Thank you!