How do tu get past Nimbasa City's gym leader with a Pignite, Gothia, Timber, Mincinco, and Lillipup?

What level are your pokemon? If tu want to beat the Nimbasa gym leader with the current pokemon tu have
tu can level them up, teach them strong moves. Timber should learn rock slide at level 31. tu can use that if tu could get that high to beat Emolga since it's a flying type. But be careful Timber is a fighting type. Flying type may beat your Timber. tu can't let that happen. Your Pignite can learn Rollout at level 23. The mover only has power strength only 30. :( I guess tu could give that a try if tu want. For Zebstrika if tu have a dig TM tu can beat it por teaching your Lillipup, Timber, and Minnccino. o instead of using the super effective type moves tu can try beat the pokemon with high powered moves tu can teach for now. Ex: Retaliate, Hammer Arm, Hyper Voice. Hope this works! :)