Now, from R/S/E, some stats on Mightyena and coparing him to the evolved forms of other early Pokemon.
So far, I've determined Mightyena to be one of the best of them.
Mightyena
Hp- 344
Atk - 279
Def - 239
Spd - 239
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Linoone
Hp- 360, he beats Mightyena by a little
Atk - 239, He lacks the power Mightyena's fangs have
Def - 221, He also lacks the stamina
Speed- 299, but he makes up for it with this.
Notes: He lacks the power and stamina of Mightyena, but makes up for it with sheer speed. A very fast early evo
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Beautifly
HP - 324, Mightyena beats her in this
Atk - 239, Again, Mightyena has a very high Attack stat for a early in evolution.
Def - 199, Butterflies lack in defense, but Mightyena can keep on trying (For a while, anyway)
Speed- 229, Beautifly flies almost as fast as Might runs.
Notes: Beautifly is a Special user-it has good Spc. Def and Spec. Atk, but Mightyena wins as it's high attack tear through it's low defense.
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Dustox is more or less of a Tank version of Beautifly. Simular but lower stats in most of the stats, equal Special Def, and tied with Mightyena's defense. Dustox stats suck compared to B-fly. It's special attack is that of Linoones, which is lower then Might's. It sucks. Period.
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Swellow
HP - 324, On par with Beautifly.
Atk - 269, coming in second for attack.
Def - 219, Again, less then Mightyena
Speed - 349, he wins 1st place for speed, no questions asked.
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Out of the basic Pokemon you can get near the beggining of the game, a Poochyena would be the best to train and evolve with some great stats on Mightyena. Mightyena can take alot of hits with high HP and def, and tears through low def with attacks like Bite.
K, Dustox comes in second as a Psyical tank. Equal def to Might. With maxed out Health and Def EVs vs. a Mightyena, Bite does Approx 90 damage to Dustox-a good 30% of it's HP, and that's with maxed out HP/Def EVs. So it's take about 4 Bites to bring down a Dustox. Not bad for a move with 60 power, right? And that's assuming someone putall thier EVs in those two stats.