Mix the chilli powder, sugar, and salt on a plate.
Rim your glasses with the lime wedge and dip the rim in the chilli/sugar/salt mixture.
Add the cut up mango, pineapple juice and lime juice to a blender and blend until smooth.
in a shaker, muddle the jalapeño.
Add the blended mixture, ice, tequila and triple sec and shake until chilled.
Add ice to your glass and strain the shaker mixture in.
Slowly pour the grenadine into the glass.
Garnish with a slice of jalapeño.