1) You take a Greyhound.

That is one of these here:

They can be very fast.

2) You take one or two small monkeys

Maybe Macaques. They have the right size and little but long fingers, just like you can see it here:

3) And then you just have to teach them to become a team

• Macaques have already mastered the craft of theft, as you can see in this example from Indonesia
• and greyhounds are popular racing dogs who's top speed is beyond 60kph

I bet, Macaques riding greyhounds - or Barking Gypsies - are absolutely unbeatable when it comes to pickpocketing. A perfect source of income.

You're welcome! ;-)