Phonetic is [ˈpʏŋktçən]. It consists of two parts Pünkt-chen.

The "ü" sound really doesn't exist in English. If you know any french, the u in 'tu' (french for 'you') is pronounced similarily.

I'm guessing the 'nkt' is the hardest part to pronounce since you really have to have each letter audible.

'ch' is like a cats hissing sound.

'en' is pronounced the same way as ending without the ding.

Translation: Little dot/dots due to her face markings. 'Punkt' means 'dot', and if we wanna make a smaller version of a word (and/or cuter), a 'u' becomes an 'ü' ('a' becomes 'ä', 'o' becomes 'ö'), and the ending -chen is added.

E.g. Haar (hair) becomes Härchen, the ä is pronounced the same as the a in man, but long. In contrast, Herrchen (as in owner of a pet) is pronounced basically the same but with a ~~small~~ short vocal and a sharply pronounced r.

Hope that helps.

Edit: If you know how to pronounce a/o/u, you already know what your lips must do for ä/ö/ü. However the tongue and lower jar make for a different sound.