alright I'm looking over your created pokemon Bartmanhomer and let me break it down for you
Typing: (Fighting Steel) overall a good cross blend, The Steel Type helps blocks all of fighting's weaknesses (Psychic Flying Fairy) We've however already seen this blend with Lucario (and it's Mega Form) and Cobalion. The three main weaknesses are going to be Fire, Ground and Fighting
Stats:
HP: 50 (ugh)
Attack: 50 (really)
Defense: 100 (meh)
Special Attack: 50 (don't need it/dump it)
Special Defense: 100 (eh)
Speed: 100 (hmm)
For your defense stats, Base 100 in both def and special defense is okay however what kills you is your HP, It might tank a resisted attack or a normal attack but that's about it.
What kills your pokemon is it's poor attack stat, you say this pokemon is a physical atacker right and uses claws and teeth to attack, well the best you can do with 50 base stat attack is maybe scratches and a few nibbles. Most pokemon with 50 attack are either not physical attackers or they are first stage pokemon like Skorupi. However your overall stat total suggests this pokemon is at least evolved or is a single evolution
With the moveset you've given it's clear that you want a pokemon that can come out and get the first hit in (good speed) however you shoot yourself in the foot with a bad attack stat as it won't do much and your pokemon won't be able to survive a hit meant to hit a weakness.
Your biggest move you're going to hate is Mach Punch, this punch move will deal weakness and go before your pokemon has a chance to attack and if it's boosted by like say Iron Fist or Tough Claws then it will KO your pokemon and what your pokemon will respond with won't be enough to kill it before another mach punch comes in and definitely KOes it
High Speed does nothing against priority moves.
The main problem with this pokemon is that it's too weak to tank (Bad HP/No Recovery) too weak to revenge kill. (No Priority & Bad Attack/Special Attack) can't deal enough damage to tank and counter a pokemon with priority (again bad HP/Attack/Special Attack)
My advice, if you're really intent on making this pokemon a brawler then give it the attack power needed to be a brawler. Even a
Hitmonchan who has near the same base stat total is a better brawler then your Mauler. It has better attack power and priority moves while still having good defenses and a decent speed. You may out speed it but with mach punches it will overcome you.