Pikachu plush using Rayquaza poncho

$18.96 at Amazon

It was only sold at the Japan Pokemon Centers in July, 2016, for a very limited time and in very limited quantity during the Pokemon Center Skytree Grand Opening Campaign.

Pikachu is dressed up in a poncho (poncho is not totally removeable, but you can pull the hood back).

Made of soft material (polyester).
Size: Approximate height 8".