after looking at typings and all that to see what would works, i came up with the three best possible ideas (in my opinion) that might work
Ice/poison, ice types are generically fast so it would easily help, and being poison it can stall out with a generic poison, sub, recover or rest combo, along with the fact that it only resists grass, ice, poison, and bug which arn't that common but makes it easy to get rid of things like toxic spikes, the weakness being fire, ground, psychic, rock, and steel, which are mostly the most OU types in the game
Dark/poison, Poison cloud of death anyone, this typing actually gives it more stuff like sucker punch, taunt (thou most pokemon have that).... thats all i got..... Resists grass, poison, ghost and dark... and is weak to..... ground..... thats it
Electric/ice, Electric and ice, two of the fastest types in the game, combine the both and what do you get.... Fucked up speeds nothing might be able to beat, thou it can easily get electric moves like thunder wave and that making it very speedy for its speed stalliness or whatever you wanna call it, the resistances here are electric, ice and flying.... flying and electric types... .you might find here while its weakness are fire, fighting, ground and rock more or less again, same types mostly in OU