My Little Pony/Mucha Lucha

Cast

 * Rainbow Dash as Rikochet (both start with an R)
 * Twilight Sparkle as Buena Girl (both are the smart one)
 * Fluttershy as The Flea (both start with an F and are cute)
 * Ms. Cherilee as Senor Hasbeena (both are teachers)
 * Princess Luna as Headmistress
 * Gilda as Potato Potata Jr. (both are jerks)
 * Rarity as Penny Plutonium
 * Applejack as El Haystack Grande (both have Southern accents)
 * Sweetie Bell as Snow Pea (both are small and cute)
 * Derpy Hooves as French Twist (both are usually quiet)
 * Carrot Top as Minotoro
 * Lyra as Double Ninja Ninja
 * Bon Bon as Sonic Sumo
 * Vinyl Scratch as Zero Kelvin
 * Octavia as El Loco Mosquito
 * Scootaloo as El Rey (both tag along with Rainbow Dash and Rikochet)
 * Gummi as Masked Dog (both are pets)
 * Soarin' and Spitfire as Lone Star and Rikochet's Mom
 * Shining Armor and Cadence as Buena Parents
 * Mr. and Mrs. Cake as Mr. and Mrs. Flea
 * Pinkie Pie as Chinche (both are cute and [mostly] sweet)
 * Apple Bloom as Pulgita (both are young)