I started a new file on my Pokemon White cartridge and recently finished it. I picked Tepig as my starter. From my experience, I would say that Emboar is not as bad as people say. Emboar has an excellent Attack Stat at 123, followed by its also amazing HP and SpA stats, at 110 and 100 respectively, so it does pretty well as a Bulky mixed attacker. It's Defencive stats and Speed, all of them at 65, are not terrible in playthoughs, considering that you would most likely outspeed most opponents.
Now, let's get a look at Emboar's choices of moves. This thing gets Flame Charge, Rollout, Arm Thrust, Take Down, Heat Crash, Assurance, Flamethrower, Head Smash and Flare Blitz by Level Up, Toxic, Bulk Up, Taunt, Protect, Frustration, Solar Beam, Brick Break, Return, Smack Down, Earthquake, Flamethrower, Fire Blast, Facade, Rock Tomb, Low Sweep, Rest, Overheat, Focus Miss, Scald, Stone Edge, Gyro Ball, Rock Slide, Work Up, Buldoze, Grass Knot, Poison Jab, Substitute, Wild Charge Strength and Rock Smash by TMs/HMs, Body slam, Heavy Slam, Magnitude, Covet, Curse, Superpower, Thrash and Yawn by Breeding, while BW2 adds a MOVE TUTOR which allows Emboar to learn Fire and Thunder Punch, Iron Head, Iron Tail, Superpower, Heat Wave and Low Kick.
Looking at this list, it's safe to say that Emboar lacks a good fighting type move that isn't Brick Break or Focus Miss. Arm Thrust, being the only Fighting type move by level up is very weak and situational, Superpower is non-existent in casual plays in the OG BW games (but is added as a Tutor move in BW2), Hammer Arm is learnt at the Move relearner and it's not that good to have your speed lowered, Low sweep is a major improvement over Arm Thrust, but it is only obtainable once the Player has the Surf HM and a Flash TM and travel in the basement floor of Wellspring Cave, which leaves us to Brick Break (obtainable in Icirrus City, the 7th gym) being the safest option.
Emboar outclasses Serperior as a Starter choice (We all know that Serperior in regular playthroughs isn't impressive) and it is equally good as Samurott. However, it is, unfortunately, outclassed by Darmanitan, as a Fire-type option, which is able to learn a majority of Fire-type options including Fire Punch, Flare Blitz, Overheat, Flamethrower and has a impressive selection of coverage such as U-Turn, Rock Slide, Stone Edge, Brick Break, Smack Down, Grass Knot, Earthquake, Return, Dig while it also has a superior 140 base attack stat but quite an inferior 30 base SpA. As a Fighting-type, Emboar is outclassed by Mienshao (124 base attack, 105 base speed) and Conkeldurr (140 base attack)