The level of detail in this sprite and how fluid the animation is is incredible. The modern Koopa is so cute! Given how there is no beach Koopa, unless you plan on redrawing those little guys, it will look very weird having them come out of the shell if you choose not to use that patch. This sort of Koopa rip should pair best with NSMB series and look decent with other 3D-rendered graphics such as DKC series tilesets - highly recommended if your hack is centered around this style, and therefore is very niche as most SMW resources to date embrace various "pure" 2D styles. There is significant darkening of oranges used by common sprites so be mindful when using foes affected, vanilla or otherwise, especially if you intend to copy the custom colors to row A to use the yellow one where many fire enemies would look off.