Switchify Anything: A Switch Controller Creation Library
Similar to beefy arms and heavily inspired by the original you can use this library to add switch controller mounts to anything!
This is a library and not a customizer because any model you use will need manual tweaking. Some knowledge of OpenSCAD is required. OpenSCAD doesn't do very well with certain STLs, so you may have to pose the part and then join them in another program. I have not tested the pikachu. Have fun!