Every now and then, somebody belonging to the Old School Gamers group on Facebook posts a picture with the challenge, “Stat this!” The picture accompanying this post was one of those challenges, which obviously I met and defeated. So, without further introduction, I present…
The Sharkodiak Riders of New Penguinea
Few humanoids of sub-arctic and arctic regions inspire more fear than the sharkodiak riders of New Penguinea, and their ravaging tribes have long proven to be the one great obstacles to colonizing that vast wilderness of forests, rivers, and glaciers.
Hit Dice: 2
Armor Class: 5 
Attacks: Peck (1d4) or weapon (1d8)
Saving Throw: 16
Move: 9 (12 swimming)
Challenge Level/XP: 2/30 (3/60 for an elite)
Penguineans are squat humanoids that greatly resemble penguins. They may be found both above ground or lairing in sea caves in sub-arctic and arctic regions. They form into loosely organized clans, often ranging far from home in order to steal and kill with rapacious ferocity.
Elite penguineans often ride sharkodiaks into battle. An elite penguinean has 3 Hit Dice and a Saving Throw of 14+, is Armor Class 4 , and enjoys a +1 bonus to attack rolls due to its ferocity.
Hit Dice: 5+5
Armor Class: 6 
Attacks: 2 claws (1d4+2) and bite (1d8+2)
Saving Throw: 13
Move: 9 (9 swimming)
Challenge Level/XP: 6/400
If a sharkodiak hits with both claws, it hugs for an additional 1d10 hit points of damage. Penguineans domesticate sharkodiaks, and elite penguineans ride them into battle.