How to beat lenora whith tepig on Pokemon whight?

I would recommend you obtain a Fighting-Type Pokemon. Throh is easier to find, so I would recommend you obtain one. It can be found in the grasses of the outside area of the Pinwheel Forest. It's pretty uncommon, so it might take some time to find. After that, I would recommend you Level-Up Throh and Tepig to at least level 20. I would also recommend you evolve Tepig at Level 17. If you do all of this, I believe you can beat Lenora.

Hope this helps!

Throh is okay, but you can also fing timburr in the tall grass near the edge of town far left. There is a nurse at the front of the grass, so go there, train and heal and catch there. I like timburr because I like gurdurr better then throh. Also, if you have a friend you can trade with and trade back, then you can get a conkeldurr.

Your Tepig will become a fighting type once it evolves, so don't catch another fighting type. Just train your Pokemon.

I started off with Tepig as well,and when I got to nacrene gym, I realized that I was going through some insane difficulty. The first time it took me three times to beat lenora until I finally found a strategy. I simply levelled tepig up to around level 21 and caught a patrat at level 4 and levelled it up to level 22. Tepig knew Ember, Flame charge, Tackle and Defense curl. Watchog knew hypnosis, super fang, crunch and confuse ray.