Chihuahua Race

You can find the chihuahua race stand on the right side in the shop after you beat stage 2-1. The chihuahua race is the alternative way (other than the casino) to make extra cash.
 

There isn't all that much to this mini game. All you do is talk to the man, pick a chihuahua and hope for the best. It's all about luck, and speaking of luck, the one chihuahua that brings you the most of that is non other than Lucky Clover. ZOMG! I'm so surprised!!111 Another good pick would be Viewtiful Pup or Leg Humper. These two have a more stable probability of winning.

The best way to win is to see if any of the 3 Chihuahuas above is in the list, then make sure that their odds is the lowest of the five. If two or more of those names appear in the same list, back out of the menu and talk to the man again for a new list. This is to prevent the good-luck Chihuahuas from competiting with each other. However, if the difference in their odds is really big, it's pretty safe to choose the one with the lower odds.

The amount of gold you win is determined by the odds and your bet; just multiply them.

Winning Race Example

Losing Race Example