>>52836969double nice digits checked
Tried to run shillbunny solo with Dachsbun and got to maybe 30% before I timed out. His movepool is just too shit. Has shit all for set up/debuff moves so he's not even that great at support. It can do some stuff like set up Misty Terrain, Rain Dance and Charm but there's plenty of other 'mons who can do those things.
If you wanted a support that tanks forever you'd probably be better off with a Toxapex spamming Chilling Water or something.