Well, let's get to the analysis...TO THE CROBATCOMPUTER (had to be done)...

*er-hem* Aside from Speed, it looks dangerously similar to Pidgeot from Base Stats alone. However, Crobat's Speed cranks the usefulness-factor over Pidgeot up to nosebleed levels. Aside from lucky chance from the Speed-ties (Jolteon, Aerodactyl, and Mewtwo), only non-Defense Deoxys, Ninjask, Accelgor, and Electrode can outrun it outside of a Trick Room without Priority in play. Add potential for Sleep, two kinds of Poisoning, HP halving, becoming Confused, or Flinching and Crobat can annoy many Pokemon to no end...

...until you see how Average its non-Speed Base Stat spread is. Average defenses, Good HP, Above-Average Attack, and Below-Average Sp.Atk mean you have to rely on those things for a bulk of your offense...

...which isn't that bad, actually. Many useful Moves in its pool, such as Acrobatics, Zen Headbutt, Nasty Plot, Heat Wave, and Super Fang, are huge assets. It doesn't matter that you gave a weaker Pokemon a job over a specialist damage-dealer when it gets the same results. The fact is you can get go fire-and-forget with something like Alakazam or Terrakion, but you'll be more memorable for making an opponent frustrated to no end in the same amount of Battle time with Crobat's point-and-pick offense. This can sway a Battle on a psychological level if the opponent is shocked by your precision-over-brute-force play-style.