After Niantic released Ditto to the "Pokemon Go" players, Ditto has been an effective opponent for high leveled Pokemon Gyms. The transforming Pokemon has been a big asset to Pokemon trainers to defeat common but strong gym Pokemon like Dragonite, Snorlax, Lapras and Gyarados.
In the "Pokemon Go", when players need to choose six Pokemon to fight against the gym's Pokemon, the players often choose the Pokemon who has a higher IV or much powerful skill sets to defeat the opponent. According to Pokemon Go Pocket, using Ditto's transforming skills can help defeat and take down strong Pokemon gyms because it mirrors the opponent including the set moves.
For instance, a Pokemon Gym has Snorlax, Lapras and Dragonite in their line up the wisest thing to do is to let Ditto battle against the strongest Pokemon. The Ice-type Pokemon, Dragonite is has the strongest offense in the given line up and would be the best option to pit against the "Pokemon Go" player's Ditto.
The "Pokemon Go" players can use Ditto to copy and transform into a Lapras and replace Ditto right away with another Pokemon in your lineup to fight against the original Lapras. When the player has already defeated Lapras you can use Ditto in the form of Lapras and fight against the Dragonite.
If you don't have a Ditto yet in your "Pokemon Go", to catch the shape-shifting Pokemon you need to encounter the normal-type Pokemons like Rattata, Pidgey or Zubat. When the Pokemon has been successfully captured it will transform back in to its original Ditto form after the capture sequence.
The players might have more chances in catching a Ditto since the "Pokemon Go" Thanksgiving event is currently active and where you get double XP, double Stardust and encounter more Pokemon. GameNGuide will keep you updated on the latest "Pokemon Go" news so stay tune.