That's a good Flint!
Are you making him as playable or helper NPC?
The reason I ask is - I know its a lot of work to do sprites for playable due to all the vehicles etc.
But the same way that Snake Eyes summons his wolf Timber, we could have Sgt. Slaughter, Hawk and Clutch be able to summon helpers. Then you'd only have to do basic sprites for walk, shoot, pain, fall, rise etc.