Who's the fastest/speediest digimon?

[Gogglehead]

As far as Digimon seen in the series, Imperialdramon (in his normal form, not Fighter Mode or Paladin Mode) would seem to be the the fastest. Though he can't seem to to start and stop on a dime which is why he can't seem to use it in battle.

Now, if you count teleporting Digimon, then the series is vague on them. Vamdemon\Myotismon, Demon\Daemon and Mecuremon\Mecurymon and maybe Renemon have all been seen teleporting. It's implied that there is some sort of limit to how far they can teleport and that they have to charge the ability before using it, else they would just use it to avoid all attacks and appear behind their opponent.