The mobile gaming industry has witnessed a boom in the past few months, and Pokemon Go has benefited a lot from it. The game has been witnessing exponential growth lately and doesn't show any signs of slowing down anytime soon.

When it comes to regularly updated content, there are very few out there that rival the likes of Pokemon Go. There is something new happening pretty much every week in the game. Before a new month starts, Niantic announces a long list of events in which players can take part in the game.

• MORE: Pokemon GO: Why is Deerling Green? Is the Pokemon and Its Evolution Shiny?

These events are quite fun for players as they add a nice twist to the game and make it quite challenging. Not to forget, players get a plethora of rewards and a chance to catch some exciting Pokemon as well. A number of new Pokemon make their debut in the game via these events as well.

How to battle another trainer in Great League in Pokemon Go

This month, a new Special Research has started, known as A Seven-Colored Shadow. It kicked off on June 17 and will be lasting until September 1, so players have a lot of time to finish the tasks.

There are multiple steps in the research, so it will take a lot of time, to no surprise. However, one of the steps is a bit tricky and players are facing some issues in completing that task. Step 3 requires players to "Battle another trainer in the Great League" and that will give them a Charged TM a reward.

The problem here is that Great League is not available in the game right now. So it is not possible to battle another trainer in the Great League yet. There have been some reports of players finishing the task by battling in any league, but that hasn't worked for everyone out there.

If you indeed belong to the latter section, then you will need to wait until Great League arrives in the game. Great League will be returning to the game on July 12, so you don't have to wait a lot to be able to finish this task!