No. The most amount of immunities after Shedinja is three:
Golurk Sableye Spiritomb Drifblim Mismagius Chandelure (Flash Fire) Gengar Rotom (Normal) Jellicent (Water Absorb)
I checked the type chart.
No, but Golett, Golurk, Drifloon, and Drifblim each have three immunities. I checked our Dual Type Chart.
No. There are a few Pokemon with 3 immunities but none with 4 (Besides Shedinja), unless you count Water Absorb Jellicent holding an Air Balloon xP
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