Cut pork into large chunks about 3–4"/7.6–10.16 cm pieces, and place in base of Microwave Pressure Cooker.
Place pineapple in base of Power Chef® System fitted with blade attachment, cover, and pull cord to finely chop. Add to base of Microwave Pressure Cooker.
Stir in remaining ingredients, cover and lock Pressure Cooker. Microwave on high power 30 minutes.
Let pressure release naturally, for approximately 15 minutes. Shred and serve on desired buns.