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For a creature entry, it will look something like this:

Puppeteer         Level X Type
Medium natural beast          XP x

HP x Bloodied x/2                     Initiative X
AC x Fortitude x Reflex x Will x       Perception x
Speed 6                                   All-Round Vision

Traits
Insanity
(Not sure what to put yet)
Herd Mentality
Can run without the running penalties

Standard Actions
Kick * At-Will
Attack:  Melee 1 (one creature); x vs AC
Hit: ydx + z damage

Skills
Arcana x Dungeoneering x History x
Str x Dex x Wis x
Con x Int x Cha x

Alignment unaligned Languages Common, Deep Speech

I just haven't figured out at what the x's, y's, and z's should be yet.

The PC version is just as difficult.

Puppeteer
Racial Traits
Average Height:  x to y
Average Weight:  x to y

Ability Scores:  +2 Int, +2 Con/Dex (I'm leaning toward either Dex or Str, just not sure which)
Size:  Medium
Speed:  6 squares
Vision:  Normal, All-round vision

Languages:  Common, Deep Speech
Skill Bonuses:  +2 Arcana, +2 Dungeoneering
Insanity:  (Not sure what to put yet)

That's all I have for now.

I didn't think of the surprise aspect.  I like it.