On Sunday, February 10 at 12 am to 12 pm local time in Pokemon GO an event called Go Battle Day will take place. This event is fully focused on PVP, it allows you to complete more battles and get more rewards by doing so. Here i will guide you through the full event.
Bonuses
• 4x Stardust from win rewards in GO Battle League
• The maximum amount of battles you can complete will be increased from 25 to 100 (from 5 sets to 20)
• There will be a free Timed Research featuring an Elite TM and various battle items
Active leagues
• Master League (Pokemon 2500 CP or higher)
• Evolution Cup: Great League Edition (Pokemon below 1500 CP, only Pokemon that have evolved once and can be evolved again are eglible)
Some of the best Pokemon in Evolution Cup are Vigoroth, Shadow Golbat, Dusclops and Hakamo-o.
Timed Research
One of the best things about this event is Timed Research - completing it will give you an Elite TM, which is a very valuable item. It will also have rewards such as XP, possibly Rare Candy and based on previous GO Battle Days a cosmetic item.
It will be fully based on battling in the GO Battle League with steps such as "Battle in the GO Battle League x times" or "Use x supereffective Charged Attacks".